Peter has to walk 2.5 miles to get to the grocery store. If it takes him 20 minutes to walk one mile and he has walked 1 mile already, how many more minutes does he have to walk to reach it?
Let’s work this out in a step by step way to be sure we have the right answer.
30
Peter has to walk a remaining 2.

5 total miles - 1 mile completed = 1.

5 miles remaining.

It will take him another 20 minutes * 1.

5 miles remaining = 30 minutes to get to the grocery store.

.

So, the answer is 30