Question

Jessica had eaten 2/6 of a pizza. and then she gave 3/6 of her pizza to her friend mile. how many slices of pizza left?

Answer 1

she'll have 1/6 of pizza left. 

Answer 2

1/6 of the pizza is left or 1 slice is left.
3/6 + 2/6 = 5/6. 5/6 of the pizza was eaten.
There is 1/6 or 1 slice of the pizza left.