Question

Leah solved 40 arithmetic problems in 2 1/2 minutes. Which of the following best represents her unit rate?

A. 2 1/2 problems per minute

B. 8 problems per minute

C. 16 problems per minute

D. 40 problems per minute

Answer 1

Answer:

Leah's unit rate is 16 problems per minute.

Step-by-step explanation:

To find her unit rate, we need to find how many problems she can do in 1 minute. Our current fraction is $\frac{40}{2.5}$. We need to divide the top and bottom by 2.5 to get the rate per minute

$\frac{40}{2.5}$ = $\frac{16}{1}$

Leah's unit rate is 16 problems per minute.