Since both 1/2 and 2/5 have different denominators, you have to find fractions equivalent to them, (using multiples) that both have the same denominator. It's when 1/2 is equal to 2/4. 1/2=5/10 2/5=4/10 then solve with your "new" fractions with more ease. 5/10+4/10=9/10 If possible, simplify, but 9/10ths is already in it's simplest form.
