Question

your friend drinks 2/3 of a bottle of water you drink 5/7 of a bottle of water find the difference of amounts of water left in each bottle

Answer 1

Well you would convert the fractions to fractions with the same denominator which would make it 14/21 for the first friend and 15/21 for the second friend. But the question is asking how much is left so you have to subtract what is left in each bottle. The first friend has 7/21 left and the second friend has 6/21 left. So, the answer is 1/21.