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Percentage is parts per 100.

How many 20s in 100? Can you do that without a calculator? Divide bot by ten: how many 2s in 10? Surely you can do that with your fingers!

The answer is 5.

So 17/20 is 17*5 per cent.

So here comes the harder bit. How much is 17 times 5?

Well 10 times 5 is 50

and 7 times 5 (remember your 5 times table) is 35

so 17 times 5 is 85

Answer 85%

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11y ago
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Q: How do you figure out the percent of 17 20 ths with out using a calculatar?
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