I already answered on your previous post, but here's the answer again. By the way, it's still flipped the wrong way
Mark and Lisa both started with 5/4 litres (l),
Mark drank 1/3 l => 5/4 - 1/3 = 11/12 left
Lisa spilled and had 2/5 l left => 5/4 - 2/5 = 17/20 spilled