Question

(Please someone help me!) (No links!)

Theo wants to use a cookie recipe that makes 36 cookies but he wants to reduce the number of cookies to 24. If the recipe specifies using 4.5 cups of flour, how much flour should he use?

Answer 1

3 cups

Explanation:

`36 : 24 = 4.5 : x`

where
`x` is the amount of flour he should use

Therefore,

`(36)/(24) = (4.5)/(x)`

Cross multiply:
`36x = 4.5 * 24`

`\implies 36x = 108`

Divide both sides by 36:
`x = 108 / 36 = 3`

Therefore, he should use 3 cups of flour