Chapter SH, Problem 7.3.4EP

To determine

To calculate: To solve the problem using percent proportion and round to the nearest tenth if necessary

Answer to Problem 7.3.4EP

  $120\%$ of $312$ is $374.4$

Explanation of Solution

Given information: Problem is what is $120\%$ of $312$

Formula Used:

Percent proportion is an equation where a percent is equal to an equivalent ratio

Formula for percent proportion is

  $\frac{amount}{base}=\frac{percent}{100}$

Calculation:

Given problem is as follows:

what is $120\%$ of $312$

Let amount be $x$

Using percent proportion,

  $\frac{amount}{base}=\frac{percent}{100}$

Substituting the values,

  $\begin{array}{l}\frac{x}{312}=\frac{120}{100}\\ Amount=\frac{120\times 312}{100}\\ Amount=\frac{37440}{100}\\ Amount=374.40\\ Amount=374.4\end{array}$

Conclusion:

Hence, $120\%$ of $312$ is $374.4$