Sarjot ate 2/3 of his pizza. His sister ate 1/4 of what was left. How much of the pizza was left at the end?

Answer 1

1-2/3 = 1/3

1/4 x 1/3 = 1/12

2/3 + 1/12 = 9/12 = 3/4 of the pizza was eaten

1-3/4 = 1/4 of the pizza is left