Q39. - Algebra 1

Question

Use the percent proportion to find each number.

50% of what number is 31?

Step-by-Step Solution

Answer

31 is 50% of 62.

Step 1.

Let x and y be the number of the given and actual number

$\begin{array}{l}x=31\\ y=?\end{array}$

Step 2. Formula used.

To find what percent is a number x of another number y, use the below formula

$x\text{ is percent of }y=\frac{x\times 100}{y}\%$

Step 3. Find the actual number y.

$\begin{array}{l}\frac{31\times 100}{y}\%=50\%\\ 31\times 100=50y\\ y=62\end{array}$

Therefore, 31 is 50% of 62.