Chapter 7, Problem 3CR

To determine

To state: If the percent of change from $85$ to $34$ a percent of increase or a percent of decrease.

Answer to Problem 3CR

The percent of change from $85$ to $34$ is a percent decrease of $60\%$ .

Explanation of Solution

Given information:

The following percent change;

  $85$ to $34$ .

To find the percent change, divide the amount of increase or decrease by the original amount. Since the change is from $85$ to $34$ , the amount has decreased. Therefore,

  $\begin{array}{l}\text{Percent of change=}\frac{\text{Amount of decrease}}{\text{Original amount}}\text{ [Write formula for percent of decrease]}\\ =\frac{85-34}{85}\text{ [Substitute]}\\ =\frac{51}{85}\text{ [Subtract]}\\ =0.6\text{ [Write fraction as decimal]}\\ =60\%\text{ [Write decimal as percent]}\end{array}$