Applications of Unit Rates

Question

Susan can read 72 words in  of a minute. Which statement is correct?

She can read 24 words per minute, because 72 divided by  is equal to 24.

She can read 24 words per minute, because 72 times  is equal to 24.

She can read 216 words per minute, because 72 divided by  is equal to 216.

She can read 216 words per minute, because 72 times  is equal to 216.

Answer 1

The correct choice is:

She can read 216 words per minute, because 72 divided by  is equal to 216.

Since there are 3 one-thirds in one whole, you can find the number of words read in 1 minute by multiplying 72 by 3.

This is accomplished by dividing 72 by 1/3.