Here is a problem I found in Jo Boaler’s book “What’s math got to do with it?” She credits it to Ruth Parker:

 

A woman is on a diet and goes into a shop to buy some turkey slices.  She buys 3 slices which together weigh 1/3 of a pound, but her diet says that she is only allowed to eat 1/4 of a pound.  How much of the 3 slices she bought can she eat while staying true to her diet?

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