henry can swim 3 laps in 7 minutes how long will it take him to swim 15

Question

Please explain to me how to come up with the answer. I know the answer but need to explain how i got there to my child

Answer 1

15 / 3 = 5; 5 * 3 = 15.

 

That is, Henry is swimming his three laps five times. If he can do one set of three in seven minutes, we're looking for five sets of three in how many minutes.

 

So we multiply five times seven, and we get 35 minutes.

 

I hope this is written clearly enough for you to describe.