Question

A recipe calls for 2/3 of a cup of milk for 29 cookies. How many cups of milk are needed to make 87 cookies?

Answer 1

Explanation:

since 2/3 cups are used to make 29 cookies... which can be written as 2/3=29cookies

then how many cups of milk will be used to make 87 cookies...which is x=87 cookies

now we have 2 equations

2/3=29cookies

x. =87 cookies

cross multiply and you will have

29x=87×2/3

29x=58

divide both sides by 29 and x equals 2

Answer 2

Answer: 2 cups of milk

Explanation:

We will set up a proportion to help us solve. We will put cups of milk in the numerator and number of cookies in the denominator.

`\displaystyle (2/3 \;\;cup)/(29\;\;cookies) =(x\;\;cups)/(87\;\;cookies)`

Now, we can cross-multiply.

29 * x = 2/3 * 87

29x = 58

x = 2

2 cups of milk are needed to make 87 cookies.