thembi counted 15 cupcakes left from mothers whole batch for the picnic. We've already eaten two-fifths she noted. How many cupcakes did mother bake?

Question

In word form

Answer 1

If two fifths have been eaten then three fifths remain. So fifteen cupcakes represent three fifths of the batch. So one fifth is a third of fifteen cupcakes, that is, five cupcakes, and five fifths, the whole batch, is five times as much, making twenty-five cupcakes in the batch.