Question

Yesterday, Anna drank 2/6 of a gallon of milk. Then her sister drank some milk and now there is only 3/12 of the gallon left. How much of the gallon did Anna's sister drink?

Answer 1

5/12

Explanation:

Change the denominator of 6 to 12.

2 x 2 = 4

6 x 2 = 12

Find out how much gallon of milk was drank.

12/12 - 3/12 = 9/12

Find out how much the milk was drank after deducting how much Anna drank.

9/12 - 4/12 = 5/12