Question

Caroline, Colin & Sarah share some money.

Caroline gets
1
9
of the money.
Colin and Sarah share the rest in the ratio 1:3.
What proportion does Sarah get?

Answer 1

Colin and Sarah get 1 - 1/9 = 8/9 of the money

A ratio of 3 :1 means that there are 4 parts of the 8/9....so....each part = 8/9 * 1/4 = 8/36 = 2/9

And Colin gets 3 parts of the 8/9 = 3 * 2/9 = 6/9 = 2/3 of the money

Explanation: