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When a number is decreased by 10% of​ itself, the result is 72. what is the​ number?
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When a number is decreased by 10% of​ itself, the result is 72. what is the​ number?

User Bk Razor
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1 Answer

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use proportion:-

a decrease by 10% means the resulting number is 90% of the original number, so:-

90% is equivalent to 72

So 100% = (100 * 72) / 90 = 80 Answer.
User Fledgling
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