griefreeze

@[email protected]

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griefreeze ,

Another neat trick: X% of Y is equal to Y% of X. That is, in your example, 27% of 65 == 65% of 27. So check and see which combination might provide fewer steps/messy numbers.

13.5 (50% of 27) + 2.7 (10% of 27) + 1.35 (5% of 27) = 17.55

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