Question

Last month, when Joe took his puppy to the veterinarian, the puppy weighed 6.2 pounds. This month, the puppy weighed 8.68 pounds. What is the percentage increase of the weight of the puppy? A. 2%
B. 29%
C. 71%
D. 40%

Answer 1

Short Answer: D

Solution

Difference in weight = 8.68 - 6.2 = 2.48 pounds

%increase = x

6.2 * x/100 = 2.48                         Divide by 6.2 on both sides

(6.2 * x /100) ÷ 6.2 = 2.48 / 6.2    Simplify the left. Divide the right.

x / 100 = 0.4                                  Multiply both sides by 100

100 * x / 100 = 0.4 * 100                Combine

x = 40 %

Answer

The Puppy went up 40% in weight.

Answer 2

D because 6.2=100
6.2×1.4=8.68
so 100×1.4=140
140-100=40
so it's 40%