Exercise 15 Page 148

To determine a 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 1325.60 and the new amount is 1685.60, which is an increase. 1685.60- 1325.60= 360 The difference between the new amount and the original amount is 360. Now we can use the formula.

Percent change=Amount of increase/Original amount

SubstituteValues

Substitute values

Percent change=360/1325.60

UseCalc

Use a calculator

Percent change ≈ 0.27

WritePercent

Convert to percent

Percent change ≈ 27 %

The percent increase is approximately 27 %.