Question

Manuel ate 1/3 of the cracker on a plate. His brother ate 1/4 of the cracker. their were 5 crackers left on the plate. How many cracker were there to begin with?

Answer 1

5 and 7/12 of a cracker

Answer 2

1/3 + 1/4 = 4/12 + 3/12 = 7/12
7/12 =  both brothers ate 7 crackers out of 12 crackers

there were 5 crackers left on the plate means 5/12 crackers left on the plate

answer: 12 crackers at the begining