Question

In 2006, there were 72 million dogs in U.S. Homes. In 2010, there were 70 million dogs. What was the percent decrease in the number of dogs in U.S. Homes from 2006 to 2010? A. about 0.03% B. about 0.97% C. about 3% D. about 97% Speed: NormalVoice: Female Volume: 70%

Answer 1

Answer: C. about 3%

Explanation:

In 2006 , Number of dogs in U.S. dogs = 72 million

In 2010, Number of dogs in U.S. dogs = 70 million

The percent decrease in the number of dogs in U.S. Homes from 2006 to 2010 =

`\frac{\text{Change in number of dogs}}{\text{Number of dogs in 2006}}*100\%\\\\=\frac{(72-70)\text{ million}}{70\text{ million}}*100\%\\\\=(2)/(7)*10\%\approx3\%`

So, the percent decrease in the number of dogs in U.S. Homes from 2006 to 2010 was about 3%.

Hence, the correct option is C. about 3%