Chapter 8.2, Problem 48E

To determine

To find:

The 90 percent of the given number.

Answer to Problem 48E

90% of 80 would be72.

Explanation of Solution

Given:

A number: 80.

Calculation:

To find 90% of 80, we will multiply 80 by $\frac{90}{100}$ because percent means per hundred.

  $\begin{array}{l}90\%\text{ of 80}\Rightarrow \frac{90}{100}\times 80\\ 90\%\text{ of 80}\Rightarrow \frac{9}{10}\times 80\\ 90\%\text{ of 80}\Rightarrow 9\times 8\\ 90\%\text{ of 80}\Rightarrow 72\end{array}$

Therefore, 90% of 80 would be 72.