Kristen can type 160 words in 4 minutes. how many words per minute can kristen type

Set it up like this

You know you need it to be in one minute, so at the bottom where the minutes are, you put the 1.

Cross multiply, meaning you multiply the numbers that are across. In this case, it is 160 X 1.

You get 160, and then you divide it by the "bottom" number, in this case 4.

The answer for the "?" is 40.

The answer is -pie over 2