Chapter 7

A These problems are similar to the examples found in this section. They should be set up and solved in the same way. (Problems 1-12 involve simple interest.) Savings Account A man invests \(\$ 2,000\) in a savings plan that pays \(8 \%\) per year. How much money will be in the account at the end of 1 year?

Solve each of the following problems by first restating it as one of the three basic percent problems of Section 7.2 . In each case, be sure to show the equation. Test Scores On a 120 -question test a student answered 84 correctly. What percent of the problems did the student work correctly?

Solve each of these problems using the method developed in this section. If a person earns \(\$ 23,000\) a year and gets a \(7 \%\) increase in salary, what is the new salary?

These problems should be solved by the method shown in this section. In each case show the equation needed to solve the problem. Write neatly, and show your work. [Examples 1-3] Sales Tax Suppose the sales tax rate in Mississippi is \(7 \%\) of the purchase price. If a new food processor sells for $$ 750,$ how much is the sales tax?

Solve each of the following problems. What number is \(25 \%\) of \(32 ?\)

Write each percent as a fraction with denominator \(100 .\) $$20 \%$$

A These problems are similar to the examples found in this section. They should be set up and solved in the same way. (Problems 1-12 involve simple interest.) Savings Account How much simple interest is earned on \(\$ 5,000\) if it is invested for 1 year at \(5 \% ?\)

Solve each of these problems using the method developed in this section. A computer programmer's yearly income of \(\$ 57,000\) is increased by \(8 \% .\) What is the dollar amount of the increase, and what is her new salary?

Solve each of the following problems by first restating it as one of the three basic percent problems of Section 7.2 . In each case, be sure to show the equation. An engineering student answered 81 questions correctly on a 90 -question trigonometry test. What percent of the questions did she answer correctly? What percent were answered incorrectly?

These problems should be solved by the method shown in this section. In each case show the equation needed to solve the problem. Write neatly, and show your work. [Examples 1-3] Sales Tax If the sales tax rate is \(5 \%\) of the purchase price, how much sales tax is paid on a television that sells for $$ 980 ?$

Write each percent as a fraction with denominator \(100 .\) $$40 \%$$

Solve each of the following problems by first restating it as one of the three basic percent problems of Section 7.2 . In each case, be sure to show the equation. A basketball player made 63 out of 75 free throws. What percent is this?

Solve each of these problems using the method developed in this section. The yearly tuition at a college is presently \(\$ 6,000 .\) Next year it is expected to increase by 17) \(\%\). What will the tuition at this school be next year?

These problems should be solved by the method shown in this section. In each case show the equation needed to solve the problem. Write neatly, and show your work. [Examples 1-3] Sales Tax and Purchase Price Suppose the sales tax rate in Michigan is \(6 \% .\) How much is the sales tax on a \(\$ 45\) concert ticket? What is the total price?

Write each percent as a fraction with denominator \(100 .\) $$60 \%$$

A These problems are similar to the examples found in this section. They should be set up and solved in the same way. (Problems 1-12 involve simple interest.) Savings Account A local bank pays \(5.5 \%\) annual interest on all savings accounts. If \(\$ 600\) is invested in this type of account, how much will be in the account at the end of a year?

Solve each of the following problems by first restating it as one of the three basic percent problems of Section 7.2 . In each case, be sure to show the equation. A family spends 450 dollar every month on food. If the family's income each month is 1,800 dollar what percent of the family's income is spent on food?

Solve each of these problems using the method developed in this section. A market increased the price of cheese selling for \(\$ 4.98\) per pound by \(3 \% .\) What is the new price for a pound of cheese? (Round to the nearest cent.)

These problems should be solved by the method shown in this section. In each case show the equation needed to solve the problem. Write neatly, and show your work. [Examples 1-3] Sales Tax and Purchase Price Suppose the sales tax rate in Hawaii is \(4 \% .\) How much tax is charged on a new car if the purchase price is \(\$ 16,400 ?\) What is the total price?

Solve each of the following problems. What number is \(15 \%\) of \(75 ?\)

Write each percent as a fraction with denominator \(100 .\) $$80 \%$$

Savings Account A local bank pays \(5.5 \%\) annual interest on all savings accounts. If \(\$ 600\) is invested in this type of account, how much will be in the account at the end of a year? Bank Loan A farmer borrows \(\$ 8,000\) from his local bank at \(7 \% .\) How much does he pay back to the bank at the end of the year when he pays off the loan?

Solve each of the following problems by first restating it as one of the three basic percent problems of Section 7.2 . In each case, be sure to show the equation. Chemistry How much HCl (hydrochloric acid) is in a \(60-\) milliliter bottle that is marked \(75 \% \mathrm{HCl}\) ?

Solve each of these problems using the method developed in this section. In one year a new car decreased in value by \(20 \%\). If it sold for \(\$ 16,500\) when it was new, what was i worth after 1 year?

These problems should be solved by the method shown in this section. In each case show the equation needed to solve the problem. Write neatly, and show your work. [Examples 1-3] Total Price The sales tax rate is \(4 \% .\) If the sales tax on a 10-speed bicycle is \(\$ 6,\) what is the purchase price? What is the total price?

Solve each of the following problems. What number is \(54 \%\) of \(38 ?\)

Write each percent as a fraction with denominator \(100 .\) $$24 \%$$

A These problems are similar to the examples found in this section. They should be set up and solved in the same way. (Problems 1-12 involve simple interest.) Bank Loan If \(\$ 400\) is borrowed at a rate of \(12 \%\) for 1 year, how much is the interest?

Solve each of the following problems by first restating it as one of the three basic percent problems of Section 7.2 . In each case, be sure to show the equation. How much acetic acid is in a 5 -liter container of acetic acid and water that is marked \(80 \%\) acetic acid? How much is water?

Solve each of these problems using the method developed in this section. A certain light beer has \(20 \%\) fewer calories than the regular beer. If the regular beer has 120 calories per bottle, how many calories are in the samesized bottle of the light beer?

These problems should be solved by the method shown in this section. In each case show the equation needed to solve the problem. Write neatly, and show your work. [Examples 1-3] Total Price The sales tax on a new microwave oven is $$ 30 .\( If the sales tax rate is \)5 \%,$ what is the purchase price? What is the total price?

Solve each of the following problems. What number is \(72 \%\) of \(200 ?\)

Write each percent as a fraction with denominator \(100 .\) $$48 \%$$

A These problems are similar to the examples found in this section. They should be set up and solved in the same way. (Problems 1-12 involve simple interest.) Bank Loan A bank lends one of its customers \(\$ 2,000\) at \(8 \%\) for 1 year. If the customer pays the loan back at the end of the year, how much does he pay the bank?

Solve each of the following problems by first restating it as one of the three basic percent problems of Section 7.2 . In each case, be sure to show the equation. A farmer owns 28 acres of land. Of the 28 acres, only \(65 \%\) can be farmed. How many acres are available for farming? How many are not available for farming?

Solve each of these problems using the method developed in this section. A person earning \(\$ 3,500\) a month gets a raise of \(\$ 350\) per month. What is the percent increase in salary?

Tax Rate Suppose the purchase price of a dining room set is $$ 450 .\( If the sales tax is \)22.50, what is the sales tax rate?

Write each percent as a fraction with denominator \(100 .\) $$65 \%$$

A These problems are similar to the examples found in this section. They should be set up and solved in the same way. (Problems 1-12 involve simple interest.) Bank Loan If a loan of \(\$ 2,000\) at \(20 \%\) for 1 year is to be paid back in one payment at the end of the year, how much does the borrower pay the bank?

Solve each of the following problems by first restating it as one of the three basic percent problems of Section 7.2 . In each case, be sure to show the equation. Number of Students Of the 420 students enrolled in a basic math class, only \(30 \%\) are first-year students. How many are first-year students? How many are not?

Salary Increase A person earning \(\$ 3,500\) a month gets a raise of \(\$ 350\) per month. What is the percent increase in salary? \(A\) student reader is making \(\$ 6.50\) per hour and gets a \(\$ 0.70\) raise. What is the percent increase? (Round to the nearest tenth of a percent.)

Tax Rate If the purchase price of a bottle of California wine is $$ 24\( and the sales tax is $$ 1.50\) what is the sales tax rate?

Solve each of the following problems. What number is \(2 \%\) of \(49 ?\)

Write each percent as a fraction with denominator \(100 .\) $$35 \%$$

A These problems are similar to the examples found in this section. They should be set up and solved in the same way. (Problems 1-12 involve simple interest.) Student Loan A student takes out an emergency loan for tuition, books, and supplies. The loan is for \(\$ 600\) with an annual interest rate of \(5 \% .\) How much interest does the student pay if the loan is paid back in 60 days?

Solve each of the following problems by first restating it as one of the three basic percent problems of Section 7.2 . In each case, be sure to show the equation. Determining a Tip Servers and wait staff are often paid minimum wage and depend on tips for much of their income. It is common for tips to be \(15 \%\) to \(20 \%\) of the bill. After dinner at a local restaurant the total bill is 56.00 dollar since your service was above average you decide to give a \(20 \%\) tip. Determine the amount of the tip you leave for your server.

Solve each of these problems using the method developed in this section. Shoes that usually sell for \(\$ 25\) are on sale for \(\$ 20 .\) What is the percent decrease in price?

Solve each of the following problems. What percent of 24 is \(12 ?\)

Change each percent to a decimal. $$23 \%$$

A These problems are similar to the examples found in this section. They should be set up and solved in the same way. (Problems 1-12 involve simple interest.) Short-Term Loan If a loan of \(\$ 1,200\) at \(9 \%\) is paid off in 90 days, what is the interest?