You need to convert each fraction so that there's a common denominator, that's a number that both 3 and 5 go into. They both go into 15. Take the first fraction: 2/3. To make the 3 in the denominator into 15 you need to multiply it by 5, so do this and multiply the numerator by 5, too: 10/15. Take the other fraction: 14/5 and multiply the numerator and denominator by 3: 42/15. Now we have both fractions with the same denominator. We have 10 fifteenths plus 42 fifteenths. You add these just like you add apples, oranges, bananas, whatever. 10+42=52 so the answer is 52 fifteenths written 52/15. This is an improper fraction because the numerator is bigger than the denominator, so we can convert it to a mixed number. 15 goes into 52 3 times (3*15=45) with remainder 7 (52-45=7) fifteenths. We write this: 3 7/15.