A recipe calls for 2/3 of a cup of milk for 10 cookies. How many cups of milk are needed to make 90 cookies?

3 answers

To find out how much milk is needed for 90 cookies, we can set up a proportion:

2/3 cup of milk is needed for 10 cookies
x cups of milk is needed for 90 cookies

(2/3) / 10 = x / 90

Cross multiplying, we get:
3(90) = 10(2)x
270 = 20x
x = 13.5

Therefore, 13.5 cups of milk are needed to make 90 cookies.
90/10 = x/(2/3)
6 = x
Apologies for the mistake in my previous response.

Using the correct calculation:

90/10 = x/(2/3)
9 = x/(2/3)
9 = 3x/2
x = 6

Therefore, 6 cups of milk are needed to make 90 cookies. Thank you for pointing out the error.