Greg ate 1 3/5 of the pizza and Sam ate 2 1/2 of the same pizza how much did they eat together?
1 3/5 and 2 1/2 are both bigger than 1.
how can each person eat more than the whole pizza?
In any case,
1 3/5 + 2 1/2
= 1 6/10 + 2 5/10
= 3 11/10
= 4 1/10