2/7:5/11

To add or subtract fractions, they must have a common denominator. In this case, the denominators are 7 and 11.

To find the common denominator, multiply the two denominators: 7 * 11 = 77.

Now let's convert the fractions to have a denominator of 77:

2/7 = (2 * 11) / (7 * 11) = 22/77

5/11 = (5 * 7) / (11 * 7) = 35/77

Now that the fractions have the same denominator, we can add or subtract them:

2/7 + 5/11 = 22/77 + 35/77 = (22 + 35) / 77 = 57/77

Therefore, 2/7 + 5/11 = 57/77.