A number is decreased by 15% and then increased by 12.5%. The number so obtained is 21 less than the original number. What was the original number?
Answer & explanation
Correct answer: option 4
Actual No. : New No.
-15% 20 : 17
+12.5% 8 : 9
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Total Effect 160 : 153 ⇒ 7 (decrease)
7 Unit = 21
Original no. is = 160 Units = 160 × 3 = 480