Question

There are 120 planes. 2/3 are parked. 2/5 are jets and 1/8 are ready for take off. What fraction of the total are not jets

Answer 1

41/120

2/3 of 120 is 80, you have 40 left

2/5 of 40 is 16, you have 24 left

1/8 of 24 is 3.

Subtract those totals and you will get 41 leftover.