2.5 Percent of change
Objective:​ to find percent of change and percent error
Vocabulary:
❖percent of change
❖percent of increase
❖percent of decrease
★ A percent of change is a ratio that compares the change
in quantity to the original amount.
❖Percent of change ​=
amount of change
original amount
Examples:
a)
Find the percent of change from 10 yards to 13 yards?
13 − 10 = 3
3
10 = 0.3
0.3 = 30%
30% increase
new - original
Divide the difference by the original amount
Change the decimal to percent
State whether the change is an increase or decrease
b) The price of a radio was $20. It is on sale for $15. What is
the percent of change in the price of a radio?
HW: Skills practice worksheet
Examples:
b)
25% decrease