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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 786 · 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 goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  2. 2.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  3. 3.A water tank holds 3040 litres. 30% of the water is used. How many litres are left?
  4. 4.A town has 3800 people. Its population grows by 25%. How many people live there now?
  5. 5.A price comes down by 30% and then comes down by 50% more. By what percent has it come down in all? =
  6. 6.A shop sells 840 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  7. 7.The price of a bicycle is ₹360. It goes up by 25%. What is the new price (in ₹)?
  8. 8.The price of a school bag changes from ₹600 to ₹360. By what percent did it come down?
  9. 9.A water tank holds 3240 litres. 5% of the water is used. How many litres are left?
  10. 10.A water tank holds 2260 litres. 25% of the water is used. How many litres are left?
  11. 11.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  12. 12.The price of a bicycle is ₹1860. It goes up by 5%. What is the new price (in ₹)?
  13. 13.A water tank holds 1200 litres. 25% of the water is used. How many litres are left?
  14. 14.A price comes down by 30% and then comes down by 15% more. By what percent has it come down in all? =
  15. 15.A water tank holds 920 litres. 20% of the water is used. How many litres are left?
  16. 16.A water tank holds 1480 litres. 30% of the water is used. How many litres are left?
  17. 17.The price of a bicycle is ₹2180. It goes up by 10%. What is the new price (in ₹)?
  18. 18.The price of a bicycle is ₹2220. It goes up by 30%. What is the new price (in ₹)?
  19. 19.A water tank holds 920 litres. 30% of the water is used. How many litres are left?
  20. 20.A water tank holds 4160 litres. 20% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹4240 to ₹4876. By what percent did it go up?
  22. 22.A water tank holds 2100 litres. 15% of the water is used. How many litres are left?
  23. 23.The price of a school bag changes from ₹1100 to ₹1045. By what percent did it come down?
  24. 24.A water tank holds 4080 litres. 40% of the water is used. How many litres are left?
  25. 25.The price of a bicycle is ₹280. It goes up by 30%. What is the new price (in ₹)?
  26. 26.A town has 2780 people. Its population grows by 20%. How many people live there now?
  27. 27.The price of a school bag changes from ₹3280 to ₹4100. By what percent did it go up?
  28. 28.A price goes up by 25% and then goes up by 40% more. By what percent has it gone up in all? =
  29. 29.A water tank holds 2560 litres. 30% of the water is used. How many litres are left?
  30. 30.A water tank holds 2280 litres. 20% of the water is used. How many litres are left?
  31. 31.A price comes down by 40% and then comes down by 10% more. By what percent has it come down in all? =
  32. 32.A price comes down by 20% and then comes down by 25% more. By what percent has it come down in all? =
  33. 33.The price of a school bag changes from ₹3180 to ₹2544. By what percent did it come down?
  34. 34.The price of a bicycle is ₹3760. It goes up by 15%. What is the new price (in ₹)?
  35. 35.The price of a school bag changes from ₹2080 to ₹2600. By what percent did it go up?
  36. 36.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  37. 37.The price of a school bag changes from ₹2660 to ₹1596. By what percent did it come down?
  38. 38.A water tank holds 1400 litres. 15% of the water is used. How many litres are left?
  39. 39.A water tank holds 1520 litres. 10% of the water is used. How many litres are left?
  40. 40.A water tank holds 1020 litres. 5% of the water is used. How many litres are left?

Answer key

  1. 15.5
  2. 26.5
  3. 2128
  4. 4750
  5. 65
  6. 1008
  7. 450
  8. 40
  9. 3078
  10. 1695
  11. 36.25
  12. 1953
  13. 900
  14. 40.5
  15. 736
  16. 1036
  17. 2398
  18. 2886
  19. 644
  20. 3328
  21. 15
  22. 1785
  23. 5
  24. 2448
  25. 364
  26. 3336
  27. 25
  28. 75
  29. 1792
  30. 1824
  31. 46
  32. 40
  33. 20
  34. 4324
  35. 25
  36. 52.5
  37. 40
  38. 1190
  39. 1368
  40. 969

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