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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 115 · 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 ₹2540 to ₹3556. By what percent did it go up?
  2. 2.The price of a school bag changes from ₹2820 to ₹3102. By what percent did it go up?
  3. 3.A town has 1620 people. Its population grows by 25%. How many people live there now?
  4. 4.The price of a school bag changes from ₹3840 to ₹4224. By what percent did it go up?
  5. 5.The price of a school bag changes from ₹2480 to ₹1736. By what percent did it come down?
  6. 6.The price of a school bag changes from ₹3820 to ₹4393. By what percent did it go up?
  7. 7.The price of a school bag changes from ₹620 to ₹527. By what percent did it come down?
  8. 8.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  9. 9.A shop sells 420 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  10. 10.A water tank holds 3220 litres. 40% of the water is used. How many litres are left?
  11. 11.A water tank holds 1560 litres. 25% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹2660 to ₹1995. By what percent did it come down?
  13. 13.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  14. 14.The price of a school bag changes from ₹1660 to ₹996. By what percent did it come down?
  15. 15.A water tank holds 2540 litres. 25% of the water is used. How many litres are left?
  16. 16.A shop sells 4740 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  17. 17.The price of a bicycle is ₹2440. It goes up by 30%. What is the new price (in ₹)?
  18. 18.The price of a school bag changes from ₹840 to ₹672. By what percent did it come down?
  19. 19.A water tank holds 4560 litres. 25% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹3640 to ₹2912. By what percent did it come down?
  21. 21.The price of a bicycle is ₹4400. It goes up by 40%. What is the new price (in ₹)?
  22. 22.A town has 1100 people. Its population grows by 5%. How many people live there now?
  23. 23.A water tank holds 4060 litres. 10% of the water is used. How many litres are left?
  24. 24.A shop sells 460 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  25. 25.The price of a bicycle is ₹4480. It goes up by 25%. What is the new price (in ₹)?
  26. 26.A town has 2600 people. Its population grows by 40%. How many people live there now?
  27. 27.The price of a school bag changes from ₹440 to ₹660. By what percent did it go up?
  28. 28.The price of a bicycle is ₹1260. It goes up by 25%. What is the new price (in ₹)?
  29. 29.A water tank holds 4300 litres. 15% of the water is used. How many litres are left?
  30. 30.A water tank holds 2820 litres. 50% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹3000 to ₹1800. By what percent did it come down?
  32. 32.The price of a school bag changes from ₹4020 to ₹3015. By what percent did it come down?
  33. 33.The price of a bicycle is ₹2140. It goes up by 25%. What is the new price (in ₹)?
  34. 34.A town has 4680 people. Its population grows by 50%. How many people live there now?
  35. 35.A water tank holds 920 litres. 15% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹4860 to ₹6804. By what percent did it go up?
  37. 37.A water tank holds 520 litres. 10% of the water is used. How many litres are left?
  38. 38.The price of a school bag changes from ₹840 to ₹1260. By what percent did it go up?
  39. 39.A water tank holds 2280 litres. 15% of the water is used. How many litres are left?
  40. 40.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =

Answer key

  1. 40
  2. 10
  3. 2025
  4. 10
  5. 30
  6. 15
  7. 15
  8. 37
  9. 588
  10. 1932
  11. 1170
  12. 25
  13. 56
  14. 40
  15. 1905
  16. 5214
  17. 3172
  18. 20
  19. 3420
  20. 20
  21. 6160
  22. 1155
  23. 3654
  24. 598
  25. 5600
  26. 3640
  27. 50
  28. 1575
  29. 3655
  30. 1410
  31. 40
  32. 25
  33. 2675
  34. 7020
  35. 782
  36. 40
  37. 468
  38. 50
  39. 1938
  40. 10.25

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