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Every year an amount increases by 1/8th of itself. How much will it be after two years if its present value is Rs.64000?

Correct answer: A. Rs.81000

  • A. Rs.81000
  • B. Rs.80000
  • C. Rs.75000
  • D. Rs.64000

Explanation

An increase by 1/8 means each year the amount is multiplied by 1 + 1/8 = 9/8. After 2 years, the amount is Rs.64000 x (9/8)² = Rs.64000 x 81/64 = Rs.81000. Students may choose Rs.80000 by adding only two simple increases of 1/8 of the original amount.

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Percentages express a quantity as parts per hundred and support calculations involving increases, decreases, discounts, commissions, taxes, and successive changes. Questions require distinguishing percentage change from percentage points and identifying the original value when a final value and its percentage change are given.

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