Question

A recipe for cookies requires 1/3 cup of butter. Anneliese want to make 2/5 of the recipe. How many cups of butter should Anneliese use to make the cookies? Explain how you gave your answer.

Answer 1

Anneliese needs
`(2)/(15)` cups of butter to make
`(2)/(5)` of the recipe for cookies.

Explanation:

According to the statement, a recipe for cookies require
`(1)/(3)` cup of butter and the amount of butter required to prepare
`(2)/(5)` of the recipe is determined by the following simple rule of three:

`x = ((2)/(5)\,recipe )/(1\,recipe)* (1)/(3)\,cups`

`x = (2)/(15)\,cups`

Anneliese needs
`(2)/(15)` cups of butter to make
`(2)/(5)` of the recipe for cookies.