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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 597 · 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.A price comes down by 25% and then comes down by 50% more. By what percent has it come down in all? =
  2. 2.A water tank holds 3060 litres. 20% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹1660 to ₹1494. By what percent did it come down?
  4. 4.A water tank holds 1740 litres. 30% of the water is used. How many litres are left?
  5. 5.A town has 1380 people. Its population grows by 25%. How many people live there now?
  6. 6.A water tank holds 4480 litres. 10% of the water is used. How many litres are left?
  7. 7.A shop sells 1960 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  8. 8.The price of a school bag changes from ₹2720 to ₹3264. By what percent did it go up?
  9. 9.The price of a school bag changes from ₹3080 to ₹3850. By what percent did it go up?
  10. 10.The price of a bicycle is ₹4200. It goes up by 40%. What is the new price (in ₹)?
  11. 11.The price of a school bag changes from ₹4880 to ₹6100. By what percent did it go up?
  12. 12.A water tank holds 3340 litres. 10% of the water is used. How many litres are left?
  13. 13.A water tank holds 660 litres. 10% of the water is used. How many litres are left?
  14. 14.A water tank holds 720 litres. 15% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹2080 to ₹1976. By what percent did it come down?
  16. 16.The price of a school bag changes from ₹700 to ₹980. By what percent did it go up?
  17. 17.A water tank holds 3040 litres. 20% of the water is used. How many litres are left?
  18. 18.The price of a bicycle is ₹3840. It goes up by 25%. What is the new price (in ₹)?
  19. 19.A shop sells 520 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  20. 20.The price of a school bag changes from ₹840 to ₹420. By what percent did it come down?
  21. 21.The price of a school bag changes from ₹1380 to ₹1035. By what percent did it come down?
  22. 22.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  23. 23.A town has 2380 people. Its population grows by 20%. How many people live there now?
  24. 24.A town has 2560 people. Its population grows by 15%. How many people live there now?
  25. 25.The price of a school bag changes from ₹1360 to ₹1632. By what percent did it go up?
  26. 26.A price goes up by 40% and then goes up by 50% more. By what percent has it gone up in all? =
  27. 27.The price of a school bag changes from ₹660 to ₹627. By what percent did it come down?
  28. 28.The price of a school bag changes from ₹1600 to ₹2080. By what percent did it go up?
  29. 29.A water tank holds 1020 litres. 15% of the water is used. How many litres are left?
  30. 30.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  31. 31.A water tank holds 1120 litres. 20% of the water is used. How many litres are left?
  32. 32.A town has 2400 people. Its population grows by 5%. How many people live there now?
  33. 33.A water tank holds 4240 litres. 25% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹3260 to ₹3097. By what percent did it come down?
  35. 35.The price of a school bag changes from ₹1040 to ₹780. By what percent did it come down?
  36. 36.The price of a school bag changes from ₹1060 to ₹1590. By what percent did it go up?
  37. 37.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  38. 38.The price of a school bag changes from ₹2940 to ₹2646. By what percent did it come down?
  39. 39.A water tank holds 680 litres. 40% of the water is used. How many litres are left?
  40. 40.A price goes up by 50% and then comes down by 30%. By what percent has it gone up in all? =

Answer key

  1. 62.5
  2. 2448
  3. 10
  4. 1218
  5. 1725
  6. 4032
  7. 2352
  8. 20
  9. 25
  10. 5880
  11. 25
  12. 3006
  13. 594
  14. 612
  15. 5
  16. 40
  17. 2432
  18. 4800
  19. 650
  20. 50
  21. 25
  22. 26
  23. 2856
  24. 2944
  25. 20
  26. 110
  27. 5
  28. 30
  29. 867
  30. 37.5
  31. 896
  32. 2520
  33. 3180
  34. 5
  35. 25
  36. 50
  37. 65
  38. 10
  39. 408
  40. 5

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