Chapter 2.10, Problem 7P

Tell whether each percent change is an increase or decrease. Then find the percent change. Round to the nearest percent.

Original amount: 38

New amount: 45

To determine

To tell whether the following percent change:

Original amount:38

New amount: 45

is an increase or decrease and then find the percent change and to round it to the nearest percent.

Answer to Problem 7P

Increase by $18.42\%$

Explanation of Solution

Given:

Consider Original amount:38 and New amount: 45

Calculations:

Since, New amount is greater than the original amount, therefore, the percent change is an increase.

In order to find the percent increase, subtract the original amount from the new amount and divide the difference by the original amount.

  $\Rightarrow \frac{45-38}{38}=\frac{7}{38}$

Now multiply the expression by 100.

  $\Rightarrow \frac{7}{38}\times 100=18.42\%$