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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 180 · 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 town has 2780 people. Its population grows by 10%. How many people live there now?
  2. 2.A shop sells 4700 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  3. 3.The price of a bicycle is ₹2320. It goes up by 15%. What is the new price (in ₹)?
  4. 4.The price of a school bag changes from ₹1680 to ₹1344. By what percent did it come down?
  5. 5.A water tank holds 2260 litres. 25% of the water is used. How many litres are left?
  6. 6.A water tank holds 2040 litres. 25% of the water is used. How many litres are left?
  7. 7.The price of a school bag changes from ₹1860 to ₹1674. By what percent did it come down?
  8. 8.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  9. 9.The price of a bicycle is ₹2080. It goes up by 20%. What is the new price (in ₹)?
  10. 10.A water tank holds 3860 litres. 20% of the water is used. How many litres are left?
  11. 11.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  12. 12.A water tank holds 380 litres. 25% of the water is used. How many litres are left?
  13. 13.A price comes down by 15% and then comes down by 5% more. By what percent has it come down in all? =
  14. 14.The price of a school bag changes from ₹4120 to ₹3708. By what percent did it come down?
  15. 15.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  16. 16.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  17. 17.The price of a bicycle is ₹2440. It goes up by 10%. What is the new price (in ₹)?
  18. 18.A water tank holds 3980 litres. 15% of the water is used. How many litres are left?
  19. 19.The price of a bicycle is ₹3000. It goes up by 25%. What is the new price (in ₹)?
  20. 20.The price of a bicycle is ₹3900. It goes up by 15%. What is the new price (in ₹)?
  21. 21.A water tank holds 840 litres. 40% of the water is used. How many litres are left?
  22. 22.A water tank holds 440 litres. 20% of the water is used. How many litres are left?
  23. 23.The price of a bicycle is ₹2540. It goes up by 50%. What is the new price (in ₹)?
  24. 24.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  25. 25.The price of a bicycle is ₹400. It goes up by 25%. What is the new price (in ₹)?
  26. 26.A water tank holds 1940 litres. 15% of the water is used. How many litres are left?
  27. 27.A town has 3860 people. Its population grows by 5%. How many people live there now?
  28. 28.A price comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =
  29. 29.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  30. 30.The price of a school bag changes from ₹1400 to ₹1680. By what percent did it go up?
  31. 31.A town has 320 people. Its population grows by 50%. How many people live there now?
  32. 32.A water tank holds 440 litres. 25% of the water is used. How many litres are left?
  33. 33.A water tank holds 4440 litres. 30% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹300 to ₹210. By what percent did it come down?
  35. 35.The price of a bicycle is ₹780. It goes up by 40%. What is the new price (in ₹)?
  36. 36.A water tank holds 4740 litres. 20% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹1680 to ₹1764. By what percent did it go up?
  38. 38.The price of a bicycle is ₹1220. It goes up by 30%. What is the new price (in ₹)?
  39. 39.The price of a school bag changes from ₹380 to ₹494. By what percent did it go up?
  40. 40.A shop sells 1140 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?

Answer key

  1. 3058
  2. 5170
  3. 2668
  4. 20
  5. 1695
  6. 1530
  7. 10
  8. 61
  9. 2496
  10. 3088
  11. 26
  12. 285
  13. 19.25
  14. 10
  15. 57.5
  16. 54
  17. 2684
  18. 3383
  19. 3750
  20. 4485
  21. 504
  22. 352
  23. 3810
  24. 3.5
  25. 500
  26. 1649
  27. 4053
  28. 51
  29. 36.5
  30. 20
  31. 480
  32. 330
  33. 3108
  34. 30
  35. 1092
  36. 3792
  37. 5
  38. 1586
  39. 30
  40. 1710

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