Chapter 7.6, Problem 1CYU

To determine

To calculate: The percent of change and it is increasing or decreasing.

Answer to Problem 1CYU

The percent of change is 20% and it is decreasing.

Explanation of Solution

Given information: The amount $40 changes to $32.

Calculation:

Percent of change = $\frac{New-original}{original}\times 100\%$

Here given original price $40 changes to new price $32.

Percent of change is

  $\begin{array}{l}\frac{32-40}{40}\times 100\%\\ =\frac{-8}{40}\times 100\%\\ =\frac{-1}{5}\times 100\%\\ =-\frac{100}{5}\%\\ =-20\%\end{array}$

As the percent of change is negative so it is decreasing.

  $\therefore$ Percent of change = 20% and decreasing.