Question

Which recipe makes more cookies per cup of chocolate chips?

Answer 1

We are given the recipes of Grandma and Betty Potter box.

We are asked to find out which of them makes more cookies per cup of chocolate chips.

Let us find the unit rate for both of them and compare which is greater.

Grandma:

She uses 1 1/2 cups of chocolate chips to make 24 cookies.

The unit rate is

`(24)/(1(1)/(2))=(24)/((3)/(2))=24*(2)/(3)=16`

So the unit rate is 16 cookies per chocolate chip.

Betty Potter box:

60 cookies are made using 3 chocolate chips.

80 cookies are made using 4 chocolate chips.

200 cookies are made using 10 chocolate chips.

The unit rate is

`\begin{gathered} (60)/(3)=20 \\ (80)/(4)=20 \\ (200)/(10)=20 \end{gathered}`

So the unit rate is 20 cookies per chocolate chip.

As you can see, the recipe of Better Potter box makes more cookies per cup of chocolate chip.