Chapter 6.4, Problem 32HP

To determine

To find:Real world example of a percent of increase.

Explanation of Solution

Percent of change $=\frac{A}{O}\times 100$

Where

  $A=$ Amount of change.

  $O=$ Original amount.

Assume a situation that a person went to market to purchase tomatoes.

Cost of tomatoes per kilogram today is $\$20$ .

When the same person again went to market two days later,

Then the cost of tomatoes per kilogram is $\$25$

Here,

Original value $=\$20$

Final value $=\$25$

Amount of change = Final value $-$ Original value

  $\begin{array}{l}\Rightarrow A=25-20\\ \Rightarrow A=5\end{array}$

Therefore,

Percent of change $=\frac{5}{20}\times 100$

  $\Rightarrow$ Percent of change $=\frac{500}{20}$

  $\Rightarrow$ Percent of change $=25$

Therefore,

Percent of change $=25$ .

As it is positive value it indicates percent of increase.