What is 7/8 as a percentage?

Question

Eighths come up constantly in pricing and odds. Solve in your head. What is 	frac{7}{8} written as a percentage? Aim: under 5 seconds.

Accepted Answer

Anchor on 	frac{1}{8} = 12.5\% (half of a quarter). Then 	frac{7}{8} is the whole minus one eighth: 100\% - 12.5\% = 87.5\%. Or directly, 7 	imes 12.5\% = 87.5\%. Takeaway. Memorise 	frac{1}{8} = 12.5\% and every eighth follows by multiplying: 	frac38 = 37.5\%, 	frac58 = 62.5\%, 	frac78 = 87.5\%. Reaching for the complement (1 - 	frac18) is often the fastest route for the large ones.

What is 7/8 as a percentage?

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