Question

lauren ate 3/7 of a cake. Bill ate 1/3 of the cake. How much cake is left

Answer 1

add the fractions 3/7 and 1/3 to get ???

Answer 2

is that right?

Answer 3

I just add?

Answer 4

what fraction do you get when you add?

Answer 5

well that's just one step

Answer 6

there's one more step afterward

Answer 7

5/21

Answer 8

add them then subtract from a whole(1)

Answer 9

yeah

Answer 10

is it 16/21

Answer 11

3/7 + 1/3 is indeed equal to 16/21, yes

Answer 12

that's the fraction of the cake they both ate combined

Answer 13

how much is left? well subtract that from 1 since 1 is a whole cake

Answer 14

Yep. @Bitcube was right. You add the two fractions Lauren and Bill ate. then subtract that from 21/21

Answer 15

oh thanks!