Question
If the price of a commodity increases by 15%, by what
percentage should its consumption be reduced so that the total expenditure remains unchanged?Solution
Let the original price be 100 and consumption be 100 units. New price = 115. Let new consumption be x units. To keep expenditure the same: 115 × x = 100 × 100. x = 86.96 units. Reduction in consumption = (100 - 86.96)/100 × 100 ≈ 13.04%. = 13.04%
More Percentage Questions
- A series is given with one term missing. Choose the correct alternatives from the given ones that will complete the series.
57, 59, 56, 61, 54, ___ - Select the number from among the given options that can replace the question mark (?) in the following series.
17, 18, 22, 31, 47, ___ - Which letter and number cluster will replace the question mark (?) to complete the given series?
LT6, KU12, IW24, FZ48, ____ - Select the number that can replace the question mark (?) in the following series.
24, 28, 37, 53, 78, ? - Select the letter-pair that can replace the question mark (?) in the following series?
FK, HM, LQ, RW, ZE, ? - Which letter-cluster will replace the question mark (?) in the following series?
RGV, UME, ?, AYW, DEF - Which letter-cluster will replace the question mark (?) in the following series?
NPQR, OORQ, PNSP, ____, RLUN
