Exercise 9 Page 148

To determine a [[[Method:Calculating Percent of Change|percent change]] p, we can use the following general formula. p % =Amount of increase or decrease/Original amountFrom the given values, we can see the original amount was 15 and the new amount is 14, which shows a decrease. 15 - 14= 1 The difference between the new amount and the original amount is 1. Now we can use the formula.

Percent change=Amount of decrease/Original amount

SubstituteValues

Substitute values

Percent change=1/15

UseCalc

Use a calculator

Percent change≈ 0.07

WritePercent

Convert to percent

Percent change ≈ 7 %

The percent decrease is 7 %.