Exercise 69 Page 170

Is the value of the new amount greater than or less than the value of the original amount?

Increase; 20 %

Practice makes perfect

To determine percent change p, we can use the following general formula. p %=Amount increase or decrease/Original amountFrom the given values, we can see the original amount was 10 and the new amount is 12. This is an increase in the amount. 12- 10= 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=2/10

ReduceFrac

a/b=.a /2./.b /2.

Percent change=1/5

UseCalc

Use a calculator

Percent change=0.2

WritePercent

Convert to percent