Question

1/8 + 2/5

Answer 1

5 and 8

The least common multiple (LCM) = 40

1 / 8 = 5 ∙ 1 / 5 ∙ 8 = 5 / 40

2 / 5 = 8 ∙ 2 / 8 ∙ 5 = 16 / 40

1 / 8 + 2 / 5 = 5 / 40 + 16 / 40 = 21 / 40