Liam's Scribe Post (Percent)

150 - 151

7. A herd of 100 caribou was moved to a new location. The population increased by the 10% in the first year, and increased by 20% on the second year.

a) Find the population after the second year.

100 divided by 10 equals 10
Then add 10 to 100 it becomes to 110.

First year: 110

In the second year
110x 1.20 = 132
The population for the second year is 132.
b) Explain why the percent wasn't 30% increase in two years.

Because 1o% is the increased in the first year and 20% is the increase in the second year.

Pg 149 Number 9

9. Arjay was thinking of buying a car worth $23 000, but delayed purchasing the car for a year. During that year, the cost of the car increased by 3.2%. a) What was the price of the car when Arjay purchased it? b) What was the total cost of the car including 5% GST and 5% PST?

A.) The Car price went up by $690 so it is now $20,690.20
B.)With tax it is worth 26,059.22