Question

Chris uses 9 cups of sugar to make 24 cookies. If he keeps the recipe the same, how many cups of sugar will he need to make 72 cookies?

Answer 1

You'll need 27 cups of sugar

Answer 2

so since the ratio is 9:24, and 72 can be divided by 24, and its three, so we multiply 9 too to get 27:72, and if we divide them by 3, were back to 9:24 so we know it works