Question

Joe spends 3¾ hours each day of the week to do his homework but Marcus spends only 2 hours each day of the week on his. How long in a week does Joe spends on his homework more than Marcus?
oobleck
7(3 3/4 - 2) = 7(1 3/4) = 7 * 7/4 = 49/4 = 12 1/4 hours