You and your friend skate at the same rate. You complete 6 laps in 5 minutes. How long does your friend take to complete 18 laps?

Answer 1

Hello Elaina,

You could set up 2 proportions (fractions). On top: number of laps. Bottom: minutes

6 18

_ = _

5 x

You can cross-multiply and you would get: 6x = 18*5, that is, 6x = 90

Divide both sides by 6: x = 90/6 so x =15

Your friend takes 15 minutes to complete 18 laps.