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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 47 · 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 ₹500 to ₹300. By what percent did it come down?
  2. 2.The price of a school bag changes from ₹4040 to ₹4646. By what percent did it go up?
  3. 3.A town has 320 people. Its population grows by 10%. How many people live there now?
  4. 4.The price of a school bag changes from ₹2140 to ₹1498. By what percent did it come down?
  5. 5.A water tank holds 3420 litres. 20% of the water is used. How many litres are left?
  6. 6.A shop sells 3180 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  7. 7.The price of a school bag changes from ₹100 to ₹95. By what percent did it come down?
  8. 8.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  9. 9.A town has 540 people. Its population grows by 5%. How many people live there now?
  10. 10.A water tank holds 4220 litres. 10% of the water is used. How many litres are left?
  11. 11.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  12. 12.A town has 1060 people. Its population grows by 15%. How many people live there now?
  13. 13.The price of a school bag changes from ₹900 to ₹1350. By what percent did it go up?
  14. 14.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =
  15. 15.A water tank holds 1620 litres. 10% of the water is used. How many litres are left?
  16. 16.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
  17. 17.A water tank holds 920 litres. 20% of the water is used. How many litres are left?
  18. 18.The price of a bicycle is ₹1720. It goes up by 20%. What is the new price (in ₹)?
  19. 19.The price of a school bag changes from ₹1920 to ₹2400. By what percent did it go up?
  20. 20.The price of a bicycle is ₹820. It goes up by 5%. What is the new price (in ₹)?
  21. 21.A water tank holds 620 litres. 25% of the water is used. How many litres are left?
  22. 22.A price comes down by 20% and then comes down by 30% more. By what percent has it come down in all? =
  23. 23.The price of a bicycle is ₹700. It goes up by 30%. What is the new price (in ₹)?
  24. 24.A water tank holds 3000 litres. 15% of the water is used. How many litres are left?
  25. 25.A water tank holds 1820 litres. 50% of the water is used. How many litres are left?
  26. 26.The price of a bicycle is ₹3580. It goes up by 5%. What is the new price (in ₹)?
  27. 27.The price of a school bag changes from ₹2680 to ₹3082. By what percent did it go up?
  28. 28.A water tank holds 1480 litres. 15% of the water is used. How many litres are left?
  29. 29.A town has 60 people. Its population grows by 15%. How many people live there now?
  30. 30.A water tank holds 4380 litres. 40% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹580 to ₹696. By what percent did it go up?
  32. 32.A water tank holds 60 litres. 25% of the water is used. How many litres are left?
  33. 33.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
  34. 34.The price of a school bag changes from ₹1240 to ₹1302. By what percent did it go up?
  35. 35.A water tank holds 1500 litres. 20% of the water is used. How many litres are left?
  36. 36.A water tank holds 440 litres. 5% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹2360 to ₹2124. By what percent did it come down?
  38. 38.The price of a school bag changes from ₹560 to ₹420. By what percent did it come down?
  39. 39.A water tank holds 580 litres. 30% of the water is used. How many litres are left?
  40. 40.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =

Answer key

  1. 40
  2. 15
  3. 352
  4. 30
  5. 2736
  6. 3975
  7. 5
  8. 23.5
  9. 567
  10. 3798
  11. 57.5
  12. 1219
  13. 50
  14. 43
  15. 1458
  16. 49.5
  17. 736
  18. 2064
  19. 25
  20. 861
  21. 465
  22. 44
  23. 910
  24. 2550
  25. 910
  26. 3759
  27. 15
  28. 1258
  29. 69
  30. 2628
  31. 20
  32. 45
  33. 17
  34. 5
  35. 1200
  36. 418
  37. 10
  38. 25
  39. 406
  40. 87.5

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