To add 2/5 and 3/6, we need to find a common denominator for the two fractions. The smallest number that both 5 and 6 divide into evenly is 30. So, we can convert the two fractions to have a denominator of 30:
2/5 = 12/30 3/6 = 15/30
Now, we can add the two fractions by simply adding their numerators (since they have the same denominator):
12/30 + 15/30 = 27/30
We can simplify the fraction by reducing it to the lowest terms. Both the numerator and denominator have 3 as a factor, so we can divide them both by 3:
27/30 = (3 x 9) / (3 x 10) = 9/10
Therefore, the sum 2/5 + 3/6 is equal to 9/10.