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1/3 or 33.333333....333% of 45 equals 15.

The reason this is so is because 45/3 is 15... or there is 15 + 15 + 15 = 45.

If you have a full cake that is divided into 45 pieces and 15 pieces of the cake has not been eaten, what percentage of the cake is left?

(This sort of idea)

A third of the cake has been left because 30/45 or 2/3 of the cake has been eaten, therefore 1(one full cake) - 2/3 (eaten cake) = 1/3(leftover cake).

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Q: What percent of 45 equals 15?
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