Exercise 10 Page 148

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 7.5 and the new amount is 9.5, which is an increase. 9.5- 7.5= 2 The difference between the new amount and the original amount is 2. Now we can use the formula.

Percent change=Amount of increase/Original amount

SubstituteValues

Substitute values

Percent change=2/7.5

UseCalc

Use a calculator

Percent change≈ 0.27

WritePercent

Convert to percent

Percent change ≈ 27 %

The percent increase is around 27 %.