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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 142 · 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 20% and then comes down by 10%. By what percent has it gone up in all? =
  2. 2.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  3. 3.The price of a school bag changes from ₹2300 to ₹2070. By what percent did it come down?
  4. 4.A water tank holds 2420 litres. 5% of the water is used. How many litres are left?
  5. 5.A water tank holds 300 litres. 20% of the water is used. How many litres are left?
  6. 6.A water tank holds 580 litres. 10% of the water is used. How many litres are left?
  7. 7.The price of a bicycle is ₹240. It goes up by 15%. What is the new price (in ₹)?
  8. 8.The price of a school bag changes from ₹1660 to ₹1411. By what percent did it come down?
  9. 9.A town has 1320 people. Its population grows by 5%. How many people live there now?
  10. 10.The price of a bicycle is ₹3420. It goes up by 40%. What is the new price (in ₹)?
  11. 11.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  12. 12.The price of a school bag changes from ₹4960 to ₹6944. By what percent did it go up?
  13. 13.The price of a bicycle is ₹4080. It goes up by 10%. What is the new price (in ₹)?
  14. 14.A water tank holds 420 litres. 25% of the water is used. How many litres are left?
  15. 15.A shop sells 1440 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  16. 16.A price goes up by 30% and then goes up by 20% more. By what percent has it gone up in all? =
  17. 17.A water tank holds 100 litres. 10% of the water is used. How many litres are left?
  18. 18.A water tank holds 560 litres. 20% of the water is used. How many litres are left?
  19. 19.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  20. 20.The price of a school bag changes from ₹320 to ₹352. By what percent did it go up?
  21. 21.A water tank holds 1400 litres. 15% of the water is used. How many litres are left?
  22. 22.The price of a bicycle is ₹180. It goes up by 25%. What is the new price (in ₹)?
  23. 23.The price of a bicycle is ₹4120. It goes up by 40%. What is the new price (in ₹)?
  24. 24.The price of a bicycle is ₹700. It goes up by 25%. What is the new price (in ₹)?
  25. 25.The price of a school bag changes from ₹4680 to ₹6084. By what percent did it go up?
  26. 26.A water tank holds 1920 litres. 30% of the water is used. How many litres are left?
  27. 27.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  28. 28.A shop sells 2400 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  29. 29.The price of a school bag changes from ₹2120 to ₹1484. By what percent did it come down?
  30. 30.A water tank holds 4720 litres. 20% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹4020 to ₹5226. By what percent did it go up?
  32. 32.A shop sells 2840 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  33. 33.A price comes down by 50% and then comes down by 50% more. By what percent has it come down in all? =
  34. 34.The price of a school bag changes from ₹860 to ₹946. By what percent did it go up?
  35. 35.A water tank holds 880 litres. 10% of the water is used. How many litres are left?
  36. 36.A town has 1260 people. Its population grows by 15%. How many people live there now?
  37. 37.The price of a school bag changes from ₹1460 to ₹2044. By what percent did it go up?
  38. 38.A price goes up by 5% and then goes up by 50% more. By what percent has it gone up in all? =
  39. 39.A water tank holds 2500 litres. 40% of the water is used. How many litres are left?
  40. 40.A water tank holds 1040 litres. 20% of the water is used. How many litres are left?

Answer key

  1. 8
  2. 20.75
  3. 10
  4. 2299
  5. 240
  6. 522
  7. 276
  8. 15
  9. 1386
  10. 4788
  11. 43
  12. 40
  13. 4488
  14. 315
  15. 2016
  16. 56
  17. 90
  18. 448
  19. 95
  20. 10
  21. 1190
  22. 225
  23. 5768
  24. 875
  25. 30
  26. 1344
  27. 14.5
  28. 2760
  29. 30
  30. 3776
  31. 30
  32. 2982
  33. 75
  34. 10
  35. 792
  36. 1449
  37. 40
  38. 57.5
  39. 1500
  40. 832

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