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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 89 · 40 questions
TalentJR

The method (Start value is 100%): New value after a rise of p%: value + p% of value. After a fall: value − p% of value. Percent change = change ÷ starting value × 100. Two changes a% and b% one after the other: a + b + (a × b) ÷ 100, with a fall counted as minus.

NameDateTime takenScore ___ / 40
  1. 1.The price of a school bag changes from ₹900 to ₹945. By what percent did it go up?
  2. 2.A shop sells 3020 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  3. 3.The price of a bicycle is ₹840. It goes up by 10%. What is the new price (in ₹)?
  4. 4.A water tank holds 3780 litres. 10% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹4720 to ₹6136. By what percent did it go up?
  6. 6.A water tank holds 860 litres. 5% of the water is used. How many litres are left?
  7. 7.The price of a bicycle is ₹640. It goes up by 25%. What is the new price (in ₹)?
  8. 8.A water tank holds 700 litres. 15% of the water is used. How many litres are left?
  9. 9.A water tank holds 3640 litres. 50% of the water is used. How many litres are left?
  10. 10.A town has 240 people. Its population grows by 20%. How many people live there now?
  11. 11.A town has 3200 people. Its population grows by 30%. How many people live there now?
  12. 12.A water tank holds 4380 litres. 10% of the water is used. How many litres are left?
  13. 13.A town has 4840 people. Its population grows by 15%. How many people live there now?
  14. 14.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
  15. 15.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  16. 16.The price of a bicycle is ₹4640. It goes up by 25%. What is the new price (in ₹)?
  17. 17.The price of a bicycle is ₹3680. It goes up by 15%. What is the new price (in ₹)?
  18. 18.The price of a bicycle is ₹1960. It goes up by 40%. What is the new price (in ₹)?
  19. 19.A water tank holds 380 litres. 30% of the water is used. How many litres are left?
  20. 20.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  21. 21.A water tank holds 4440 litres. 40% of the water is used. How many litres are left?
  22. 22.The price of a bicycle is ₹4140. It goes up by 5%. What is the new price (in ₹)?
  23. 23.The price of a bicycle is ₹1760. It goes up by 25%. What is the new price (in ₹)?
  24. 24.A water tank holds 2120 litres. 20% of the water is used. How many litres are left?
  25. 25.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  26. 26.The price of a school bag changes from ₹3340 to ₹3006. By what percent did it come down?
  27. 27.The price of a bicycle is ₹2440. It goes up by 10%. What is the new price (in ₹)?
  28. 28.A shop sells 2740 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  29. 29.A town has 3360 people. Its population grows by 15%. How many people live there now?
  30. 30.The price of a bicycle is ₹1620. It goes up by 30%. What is the new price (in ₹)?
  31. 31.A town has 1900 people. Its population grows by 15%. How many people live there now?
  32. 32.A price comes down by 25% and then comes down by 20% more. By what percent has it come down in all? =
  33. 33.A price comes down by 50% and then comes down by 30% more. By what percent has it come down in all? =
  34. 34.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  35. 35.The price of a school bag changes from ₹4180 to ₹3344. By what percent did it come down?
  36. 36.The price of a bicycle is ₹3160. It goes up by 15%. What is the new price (in ₹)?
  37. 37.The price of a school bag changes from ₹3040 to ₹3800. By what percent did it go up?
  38. 38.The price of a school bag changes from ₹100 to ₹80. By what percent did it come down?
  39. 39.A water tank holds 4760 litres. 5% of the water is used. How many litres are left?
  40. 40.A town has 1440 people. Its population grows by 25%. How many people live there now?

Answer key

  1. 5
  2. 3926
  3. 924
  4. 3402
  5. 30
  6. 817
  7. 800
  8. 595
  9. 1820
  10. 288
  11. 4160
  12. 3942
  13. 5566
  14. 33
  15. 65
  16. 5800
  17. 4232
  18. 2744
  19. 266
  20. 15.5
  21. 2664
  22. 4347
  23. 2200
  24. 1696
  25. 37.5
  26. 10
  27. 2684
  28. 4110
  29. 3864
  30. 2106
  31. 2185
  32. 40
  33. 65
  34. 72.5
  35. 20
  36. 3634
  37. 25
  38. 20
  39. 4522
  40. 1800

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