terri is making cookies. To make 3 dozen she uses 3 1/4 cups of chips. How many cups of chips will she need to use to make 5 dozen chips

Question

1 dozen is 12 cookies and so 3 dozen cookies means that their are 27 cookies and 5 dozens = 60 cookies 

Answer 1

We can make this like a ratio problem:

3 ¹/₄ / 3 = x / 5

Now we just need to solve for x:

3 ¹/₄ * 5 / 3 = x

15 ⁵/₄ / 3 = x

5 ⁵/₁₂ = x   (15/3 = 5, ⁵/₄ / 3 = 5/12)

So Terri is going to need 5 ⁵/₁₂ cups of chips.

 

Also for note, 3 * 12 = 36, not 27. That's 3 * 9.

You will get the same results if you have 3 ¹/₄ / 36 = x / 60 if you desire to solve that ratio.