2/5+5/8

To add fractions, you need to make sure they have a common denominator. In this case, the common denominator is 40.

First, convert 2/5 into a fraction with a denominator of 40 by multiplying the numerator and denominator by 8: (2/5) x (8/8) = 16/40

Next, convert 5/8 into a fraction with a denominator of 40 by multiplying the numerator and denominator by 5: (5/8) x (5/5) = 25/40

Now that both fractions have a common denominator of 40, you can add them together: 16/40 + 25/40 = 41/40

So, 2/5 + 5/8 = 41/40.