. Ms. Lenoir's puppy weighed 4.5 pounds when it was 5 weeks old and 7.5 pounds when it was 8 weeks old. What was the percent of increase in the puppy's weight? Round to the nearest percent.
In this problem
4.5 pounds ------> represent the 100%
Find the difference
7.5-4.5=3.0 pounds
Find the percent of increase
Applying proportion
4.5/100%=3.0/x
solve for x
x=(100*3.0)/4.5
x=66.7%
tehrefore
the answer is 67%