there are 40 marbles in a jar. Chris had 2/5 of the marbles, Sal had 1/8, Tim had 1/10, and Bob, John and Don split whatever was left over evenly. How many marbles did Bob, John and Don split ?

Answer 1

2/5 * 40 = 80/5 = 16

1/8 * 40 = 40/8 = 5

1/10 * 40 = 40/10 = 4

40 - 25 = ?