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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 266 · 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 ₹900 to ₹1035. By what percent did it go up?
  2. 2.A water tank holds 220 litres. 30% of the water is used. How many litres are left?
  3. 3.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  4. 4.A town has 3100 people. Its population grows by 5%. How many people live there now?
  5. 5.The price of a bicycle is ₹1660. It goes up by 10%. What is the new price (in ₹)?
  6. 6.A shop sells 4280 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  7. 7.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  8. 8.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  9. 9.The price of a bicycle is ₹100. It goes up by 25%. What is the new price (in ₹)?
  10. 10.A water tank holds 3640 litres. 20% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹2280 to ₹2166. By what percent did it come down?
  12. 12.A water tank holds 4080 litres. 10% of the water is used. How many litres are left?
  13. 13.A water tank holds 440 litres. 40% of the water is used. How many litres are left?
  14. 14.A water tank holds 2900 litres. 30% of the water is used. How many litres are left?
  15. 15.A water tank holds 2120 litres. 25% of the water is used. How many litres are left?
  16. 16.A price goes up by 20% and then goes up by 20% more. By what percent has it gone up in all? =
  17. 17.A price comes down by 40% and then comes down by 10% more. By what percent has it come down in all? =
  18. 18.A shop sells 1500 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  19. 19.The price of a school bag changes from ₹600 to ₹720. By what percent did it go up?
  20. 20.A price goes up by 20% and then goes up by 50% more. By what percent has it gone up in all? =
  21. 21.The price of a school bag changes from ₹2400 to ₹2640. By what percent did it go up?
  22. 22.A water tank holds 3380 litres. 15% of the water is used. How many litres are left?
  23. 23.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  24. 24.A price goes up by 25% and then goes up by 40% more. By what percent has it gone up in all? =
  25. 25.The price of a bicycle is ₹440. It goes up by 15%. What is the new price (in ₹)?
  26. 26.The price of a school bag changes from ₹2600 to ₹2860. By what percent did it go up?
  27. 27.A water tank holds 420 litres. 30% of the water is used. How many litres are left?
  28. 28.A shop sells 480 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  29. 29.A water tank holds 100 litres. 15% of the water is used. How many litres are left?
  30. 30.A water tank holds 2280 litres. 30% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹3140 to ₹1884. By what percent did it come down?
  32. 32.A price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =
  33. 33.A water tank holds 2620 litres. 40% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹1320 to ₹1452. By what percent did it go up?
  35. 35.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  36. 36.A water tank holds 340 litres. 20% of the water is used. How many litres are left?
  37. 37.The price of a bicycle is ₹3380. It goes up by 30%. What is the new price (in ₹)?
  38. 38.A price comes down by 5% and then comes down by 30% more. By what percent has it come down in all? =
  39. 39.The price of a school bag changes from ₹140 to ₹182. By what percent did it go up?
  40. 40.The price of a school bag changes from ₹320 to ₹336. By what percent did it go up?

Answer key

  1. 15
  2. 154
  3. 15.5
  4. 3255
  5. 1826
  6. 6420
  7. 26.5
  8. 43.75
  9. 125
  10. 2912
  11. 5
  12. 3672
  13. 264
  14. 2030
  15. 1590
  16. 44
  17. 46
  18. 1650
  19. 20
  20. 80
  21. 10
  22. 2873
  23. 31.25
  24. 75
  25. 506
  26. 10
  27. 294
  28. 528
  29. 85
  30. 1596
  31. 40
  32. 58
  33. 1572
  34. 10
  35. 43
  36. 272
  37. 4394
  38. 33.5
  39. 30
  40. 5

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