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Percentage & Profit Flashcards

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Formula

X% of Y = Y% of X. Use this trick = ?

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Answer

12% of 75 = 75% of 12 = 9. Much easier!

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Formula

If A is x% more than B → B is x/(100+x)×100 % less than A. Example = ?

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Answer

A 20% more than B → B is 16.67% less than A.

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Formula

Price increase → consumption decrease to keep expenditure same = ?

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Reduce by x/(100+x)×100%.

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