Ruby ate 1/3 of a pizza Angie ate 1/5 of the pizza. how much did they eat?

You have to add 1/3 and 1/5

first, you need to find a common denominater, which, in this case is 15

Since 3 times 5 is 15, the first fraction turns into 5/15 and the second fraction turns into 3/15 3 plus 5 is is 8. so the answer would be 8/15

Ruby and Angie ate 8/15 of the pizza