Question

At a bake sale there were 72 raisin cookies sold.If the ratio of raisin cookies sold to oatmeal cookies sold was 9:1, what is the combined amount of raisin and oatmeal cookies sold?Explain how to do the problem!

Answer 1

What we can actually do is multiply both sides of the ratio by x:

9x/x = 72/x

The two x's cancel out:

9x = 72

x = 8

So:

72:8

Because we're solving for the total, 72 + 8 = 80.

80 cookies were sold in total