A class is having a water balloon tossing contest . there is a large tub of water . Gavin uses 3 1/5 quarts of water to fill some balloons , and Quincey uses 6 1/2 quarts to fill more balloons . Find the total change of volume of water in the tub .
assuming the water used was taken from the tub, that gives
3 1/5 + 6 1/2 = 3 2/10 + 6 5/10 = 9 7/10 qt