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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 40 · 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 town has 1940 people. Its population grows by 50%. How many people live there now?
  2. 2.The price of a school bag changes from ₹740 to ₹925. By what percent did it go up?
  3. 3.The price of a school bag changes from ₹1480 to ₹1406. By what percent did it come down?
  4. 4.A price goes up by 30% and then goes up by 20% more. By what percent has it gone up in all? =
  5. 5.The price of a school bag changes from ₹1940 to ₹970. By what percent did it come down?
  6. 6.A town has 960 people. Its population grows by 10%. How many people live there now?
  7. 7.A water tank holds 4180 litres. 20% of the water is used. How many litres are left?
  8. 8.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  9. 9.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =
  10. 10.The price of a school bag changes from ₹3520 to ₹1760. By what percent did it come down?
  11. 11.The price of a bicycle is ₹4880. It goes up by 10%. What is the new price (in ₹)?
  12. 12.The price of a school bag changes from ₹1680 to ₹840. By what percent did it come down?
  13. 13.A shop sells 4160 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  14. 14.A shop sells 3620 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  15. 15.A water tank holds 3720 litres. 50% of the water is used. How many litres are left?
  16. 16.A water tank holds 4680 litres. 10% of the water is used. How many litres are left?
  17. 17.A shop sells 360 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  18. 18.A shop sells 820 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  19. 19.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  20. 20.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  21. 21.The price of a bicycle is ₹4200. It goes up by 30%. What is the new price (in ₹)?
  22. 22.A town has 1740 people. Its population grows by 30%. How many people live there now?
  23. 23.The price of a bicycle is ₹2960. It goes up by 10%. What is the new price (in ₹)?
  24. 24.The price of a school bag changes from ₹2020 to ₹2222. By what percent did it go up?
  25. 25.A shop sells 3920 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  26. 26.A water tank holds 3600 litres. 30% of the water is used. How many litres are left?
  27. 27.A water tank holds 4720 litres. 10% of the water is used. How many litres are left?
  28. 28.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  29. 29.The price of a school bag changes from ₹1600 to ₹1840. By what percent did it go up?
  30. 30.A water tank holds 1220 litres. 25% of the water is used. How many litres are left?
  31. 31.A shop sells 1000 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  32. 32.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
  33. 33.The price of a bicycle is ₹2080. It goes up by 50%. What is the new price (in ₹)?
  34. 34.The price of a school bag changes from ₹4820 to ₹4097. By what percent did it come down?
  35. 35.A water tank holds 600 litres. 20% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹1280 to ₹1088. By what percent did it come down?
  37. 37.A town has 4800 people. Its population grows by 20%. How many people live there now?
  38. 38.A water tank holds 380 litres. 20% of the water is used. How many litres are left?
  39. 39.A price comes down by 20% and then comes down by 25% more. By what percent has it come down in all? =
  40. 40.A water tank holds 1960 litres. 30% of the water is used. How many litres are left?

Answer key

  1. 2910
  2. 25
  3. 5
  4. 56
  5. 50
  6. 1056
  7. 3344
  8. 21
  9. 55
  10. 50
  11. 5368
  12. 50
  13. 6240
  14. 4163
  15. 1860
  16. 4212
  17. 414
  18. 902
  19. 26.5
  20. 15.5
  21. 5460
  22. 2262
  23. 3256
  24. 10
  25. 5096
  26. 2520
  27. 4248
  28. 75
  29. 15
  30. 915
  31. 1250
  32. 14.5
  33. 3120
  34. 15
  35. 480
  36. 15
  37. 5760
  38. 304
  39. 40
  40. 1372

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