What is 5/16 as a decimal?

Question

Sixteenths still appear in older price ticks and many measurements. Solve in your head. What is 	frac{5}{16} as a decimal? Aim: under 10 seconds.

Accepted Answer

Start from 	frac{1}{16}. Since 	frac{1}{8} = 0.125, halving gives 	frac{1}{16} = 0.0625. Now multiply by 5: 5 	imes 0.0625 = 0.3125. So 	frac{5}{16} = 0.3125 (equivalently 31.25\%). Takeaway. The powers-of-two fractions chain by halving: 	frac12 = 0.5, 	frac14 = 0.25, 	frac18 = 0.125, 	frac{1}{16} = 0.0625. Once you have the unit fraction, any numerator is a single multiplication away.

What is 5/16 as a decimal?

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