Question

The ratio of oil to vinegar in Chef Pierre’s salad dressing is 7 to 4. How much vinegar should Chef Pierre combine with 34 fl oz of oil?

Answer 1

`19 3/7` fl. oz. of vinegar

Explanation:

`("oil")/("vinegar") = 7/4 = (34 " fl.oz.")/x`

`rArr 7 xx x = 4 xx 34 " fl.oz."`

`rArr x= (4xx34)/7 " fl.oz."`

`rArr x = 19 3/7 " fl.oz."`