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प्रश्न
What number: When decreased by 15% becomes 170?
उत्तर
Let the number be = 100
Increase = 15% = 15
∴ Decreased number = 100 - 15 = 85
If decreased number is 85, then original number = 100
and if decreased number is 170, then original number `= 100/85 xx 170 = 200`
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