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Percentage-Ratio Equivalence

The essence of percentage–ratio equivalence lies in the fact that most of the percentage calculations like 25%, 37.5%, 33.33% etc., hover around some particular ratios only. And having a good command over these ratios is definitely going to give a good percentage calculation speed which is very essential for DI calculations as well as QA calculations. (See more such calculation in ratio, proportion and variation chapter.)

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