Question

A recipe for salad dressing calls for 1/4 cup vinegar to 2/3 cup oil.how many cups of oil are needed for each cup of vinegar

Answer 1

`( (2)/(3))( (4)/(1)) = (8)/(3)` cups of oil

Answer 2

The salad recipe needs
`(1)/(4)` cups of vinegar for every
`(2)/(3)` cup of oil.

Now we multiply both by 4

We get

The salad recipe needs
`4((1)/(4)) = 1` cup of vinegar for
`4 ((2)/(3) ) =(8)/(3)` cups of oil.

But
`(8)/(3) = 2(2)/(3)`

So for every 1 cup of vinegar we need
`2(2)/(3)` cups of oil