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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 509 · 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 40% and then comes down by 25%. By what percent has it gone up in all? =
  2. 2.A water tank holds 2160 litres. 5% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹1820 to ₹2002. By what percent did it go up?
  4. 4.A water tank holds 3580 litres. 30% of the water is used. How many litres are left?
  5. 5.A water tank holds 4940 litres. 20% of the water is used. How many litres are left?
  6. 6.The price of a school bag changes from ₹880 to ₹748. By what percent did it come down?
  7. 7.The price of a school bag changes from ₹3440 to ₹3096. By what percent did it come down?
  8. 8.A town has 4400 people. Its population grows by 10%. How many people live there now?
  9. 9.The price of a school bag changes from ₹2300 to ₹2530. By what percent did it go up?
  10. 10.A water tank holds 2340 litres. 30% of the water is used. How many litres are left?
  11. 11.A price comes down by 20% and then comes down by 40% more. By what percent has it come down in all? =
  12. 12.A price goes up by 30% and then comes down by 15%. By what percent has it gone up in all? =
  13. 13.A water tank holds 1240 litres. 40% of the water is used. How many litres are left?
  14. 14.A shop sells 420 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  15. 15.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  16. 16.A water tank holds 4460 litres. 30% of the water is used. How many litres are left?
  17. 17.The price of a bicycle is ₹3640. It goes up by 30%. What is the new price (in ₹)?
  18. 18.The price of a school bag changes from ₹1800 to ₹1620. By what percent did it come down?
  19. 19.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
  20. 20.A water tank holds 1660 litres. 10% of the water is used. How many litres are left?
  21. 21.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  22. 22.A water tank holds 4160 litres. 5% of the water is used. How many litres are left?
  23. 23.A water tank holds 320 litres. 30% of the water is used. How many litres are left?
  24. 24.The price of a bicycle is ₹840. It goes up by 5%. What is the new price (in ₹)?
  25. 25.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  26. 26.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =
  27. 27.A town has 2900 people. Its population grows by 50%. How many people live there now?
  28. 28.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  29. 29.A water tank holds 680 litres. 25% of the water is used. How many litres are left?
  30. 30.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  31. 31.A water tank holds 1940 litres. 30% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹4440 to ₹3774. By what percent did it come down?
  33. 33.The price of a school bag changes from ₹760 to ₹684. By what percent did it come down?
  34. 34.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  35. 35.A price goes up by 10% and then goes up by 20% more. By what percent has it gone up in all? =
  36. 36.A water tank holds 2380 litres. 5% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹720 to ₹576. By what percent did it come down?
  38. 38.A water tank holds 3020 litres. 25% of the water is used. How many litres are left?
  39. 39.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  40. 40.The price of a school bag changes from ₹1320 to ₹1254. By what percent did it come down?

Answer key

  1. 5
  2. 2052
  3. 10
  4. 2506
  5. 3952
  6. 15
  7. 10
  8. 4840
  9. 10
  10. 1638
  11. 52
  12. 10.5
  13. 744
  14. 441
  15. 36.25
  16. 3122
  17. 4732
  18. 10
  19. 47
  20. 1494
  21. 62.5
  22. 3952
  23. 224
  24. 882
  25. 55
  26. 55
  27. 4350
  28. 21
  29. 510
  30. 10.25
  31. 1358
  32. 15
  33. 10
  34. 36.25
  35. 32
  36. 2261
  37. 20
  38. 2265
  39. 37.5
  40. 5

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