Carol ate 2/5 of the cake; Dima ate 3/8 of the remaining cake, mom ate the rest. What fraction of the whole cake did mom eat?

Answer :

Answer:

9/40

Step-by-step explanation:

Carol ate 2/5 of the cake; Dima ate 3/8 of the remaining cake, mom ate the rest. What fraction of the whole cake did mom eat?

1 - (2/5 + 3/8) =

1 - 31/40 =

9/40

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check

9/40 + 2/5 +  3/8 = 1

the answer is good