what does 2/3 + 5/7 =
When adding or subtracting fractions, you need them
to have the same denominator. The easiest way to do
that is to multiply the two denominators: 3 * 7 = 21.
So convert both fractions into equivalent fractions that
have 21 in the denominator.
To do that, multiply one fraction by 7/7, which is actually 1,
and multiply the other by 3/3, which is also 1. You are not
changing the VALUE of the fractions, just the way they are
presented.
(2/3 * 7/7) + (5/7 * 3/3) =
14/21 + 15/21 = 29/21