Exercise 59 Page 156

To determine the 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 250 and the new amount is 200. This is a decrease in the amount. 250 - 200= 50 The difference between the new amount and the original amount is 50. Now we can use the formula.

Percent change=Amount of decrease/Original amount

SubstituteII

Amount of decrease= 50, Original amount= 250

Percent change=50/250

ReduceFrac

a/b=.a /50./.b /50.

Percent change=1/5

UseCalc

Use a calculator

Percent change=0.2

WritePercent

Convert to percent

Percent change = 20 %

The percent decrease is 20 %.