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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 32 · 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 shop sells 3580 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  2. 2.A water tank holds 4180 litres. 40% of the water is used. How many litres are left?
  3. 3.A water tank holds 3700 litres. 20% of the water is used. How many litres are left?
  4. 4.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  5. 5.A water tank holds 1400 litres. 20% of the water is used. How many litres are left?
  6. 6.The price of a school bag changes from ₹220 to ₹286. By what percent did it go up?
  7. 7.A water tank holds 280 litres. 5% of the water is used. How many litres are left?
  8. 8.A shop sells 4180 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  9. 9.The price of a school bag changes from ₹4760 to ₹3808. By what percent did it come down?
  10. 10.A shop sells 4420 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  11. 11.A price goes up by 5% and then goes up by 50% more. By what percent has it gone up in all? =
  12. 12.A shop sells 2760 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  13. 13.The price of a bicycle is ₹860. It goes up by 5%. What is the new price (in ₹)?
  14. 14.A price goes up by 30% and then goes up by 20% more. By what percent has it gone up in all? =
  15. 15.A water tank holds 3320 litres. 50% of the water is used. How many litres are left?
  16. 16.A water tank holds 1260 litres. 30% of the water is used. How many litres are left?
  17. 17.A town has 1140 people. Its population grows by 5%. How many people live there now?
  18. 18.A town has 4780 people. Its population grows by 30%. How many people live there now?
  19. 19.A shop sells 2240 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  20. 20.The price of a bicycle is ₹2480. It goes up by 5%. What is the new price (in ₹)?
  21. 21.A price goes up by 10% and then goes up by 20% more. By what percent has it gone up in all? =
  22. 22.The price of a school bag changes from ₹1980 to ₹2574. By what percent did it go up?
  23. 23.The price of a school bag changes from ₹4140 to ₹2070. By what percent did it come down?
  24. 24.The price of a bicycle is ₹3560. It goes up by 10%. What is the new price (in ₹)?
  25. 25.A town has 1060 people. Its population grows by 10%. How many people live there now?
  26. 26.A water tank holds 340 litres. 40% of the water is used. How many litres are left?
  27. 27.A price comes down by 40% and then comes down by 20% more. By what percent has it come down in all? =
  28. 28.The price of a bicycle is ₹3840. It goes up by 15%. What is the new price (in ₹)?
  29. 29.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
  30. 30.The price of a school bag changes from ₹4160 to ₹4992. By what percent did it go up?
  31. 31.A price comes down by 20% and then comes down by 30% more. By what percent has it come down in all? =
  32. 32.A town has 4400 people. Its population grows by 25%. How many people live there now?
  33. 33.A town has 4860 people. Its population grows by 15%. How many people live there now?
  34. 34.A shop sells 420 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  35. 35.A town has 2480 people. Its population grows by 5%. How many people live there now?
  36. 36.A water tank holds 4460 litres. 15% of the water is used. How many litres are left?
  37. 37.The price of a bicycle is ₹4940. It goes up by 40%. What is the new price (in ₹)?
  38. 38.A water tank holds 160 litres. 20% of the water is used. How many litres are left?
  39. 39.A town has 1020 people. Its population grows by 25%. How many people live there now?
  40. 40.A water tank holds 3000 litres. 20% of the water is used. How many litres are left?

Answer key

  1. 4296
  2. 2508
  3. 2960
  4. 8
  5. 1120
  6. 30
  7. 266
  8. 5225
  9. 20
  10. 4641
  11. 57.5
  12. 3864
  13. 903
  14. 56
  15. 1660
  16. 882
  17. 1197
  18. 6214
  19. 2352
  20. 2604
  21. 32
  22. 30
  23. 50
  24. 3916
  25. 1166
  26. 204
  27. 52
  28. 4416
  29. 14
  30. 20
  31. 44
  32. 5500
  33. 5589
  34. 504
  35. 2604
  36. 3791
  37. 6916
  38. 128
  39. 1275
  40. 2400

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