ЁЯУв Too many exams? DonтАЩt know which one suits you best? Book Your Free Expert ЁЯСЙ call Now!

  • google app store apple app store
  • тЬЦ

      Question

      Because of a 20% rise in electricity prices, Rohan

      decided to use 30% less electricity. Find out the percentage change in his electricity expenses.
      A 22% decrease Correct Answer Incorrect Answer
      B 16% decrease Correct Answer Incorrect Answer
      C 14% increase Correct Answer Incorrect Answer
      D 24% decrease Correct Answer Incorrect Answer

      Solution

      Let the initial electricity price be Rs. 100m and electricity usage be 100n units. Initial expenditure = 100m ├Ч 100n = Rs. 10000mn New expenditure = (1.20 ├Ч 100m) ├Ч (0.70 ├Ч 100n) = Rs. 8400mn Required percent = [(8400mn - 10000mn)/10000mn] ├Ч 100 = -16% decrease

      Practice Next
      More Percentage Questions

      Relevant for Exams:

      ask-question