Calculate $15 for 5 pounds

Step by step

The question

Question: $15 for 5 pounds.

How much for 1 pound?

A unit rate tells us how much for just 1.

Here: dollars for 1 pound.

1 Write it as a fraction

We write it as a fraction.

The money goes on top.

The pounds go on the bottom.

2 Divide to get 1 at the bottom

We want 1 pound on the bottom.

5 divided by 5 is 1.

We divide the top by 5 too, so the rate stays the same.

15 divided by 5 is 3.

So it is 3 dollars for 1 pound.

Per means for each.

So the unit rate is 3 dollars per pound.

3 Check

Let's check: 5 pounds at 3 dollars per pound.

5 times 3 is 15.

That is 15 dollars, so it is right!

Let's look back.

First: write it as a fraction.

Then: divide to get 1 at the bottom.

Last: check.