Sam eats 1/2 of a chocolate bar. Jack eats 1/4 of the remaining chocolate bar. After both Jack and Sam eat their portions of the chocolate bar how much is left uneaten of the original whole chocolate bar?

Answer: 3/8 of the chocolate was left uneaten

Step-by-step explanation:

The original chocolate bar is assumed to be 1

Sam eats 1/2 of a chocolate bar. It means that the remaining portion of the chocolate bar would be

1 - 1/2 = 1/2

Jack eats 1/4 of the remaining chocolate bar. This means that the portion of the chocolate bar that Jack ate is

1/4 * 1/2 = 1/8

The total portion of chocolate bar that Sam and Jack ate is

1/8 + 1/2 = (1 + 4) / 8 = 5/8

Therefore, the portion of chocolate that is left uneaten is

1 - 5/8 = 3/8