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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 869 · 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 water tank holds 1580 litres. 20% of the water is used. How many litres are left?
  2. 2.A shop sells 2000 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  3. 3.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  4. 4.A town has 1280 people. Its population grows by 40%. How many people live there now?
  5. 5.The price of a bicycle is ₹520. It goes up by 40%. What is the new price (in ₹)?
  6. 6.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  7. 7.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  8. 8.The price of a school bag changes from ₹2000 to ₹2300. By what percent did it go up?
  9. 9.A water tank holds 680 litres. 30% of the water is used. How many litres are left?
  10. 10.A water tank holds 2140 litres. 10% of the water is used. How many litres are left?
  11. 11.A water tank holds 1480 litres. 5% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹2060 to ₹1545. By what percent did it come down?
  13. 13.A water tank holds 1560 litres. 20% of the water is used. How many litres are left?
  14. 14.A shop sells 2100 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  15. 15.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  16. 16.The price of a bicycle is ₹4960. It goes up by 5%. What is the new price (in ₹)?
  17. 17.The price of a bicycle is ₹2400. It goes up by 30%. What is the new price (in ₹)?
  18. 18.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  19. 19.A shop sells 3640 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  20. 20.The price of a school bag changes from ₹360 to ₹540. By what percent did it go up?
  21. 21.The price of a school bag changes from ₹4080 to ₹4488. By what percent did it go up?
  22. 22.A shop sells 500 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  23. 23.The price of a school bag changes from ₹2100 to ₹2205. By what percent did it go up?
  24. 24.A water tank holds 4520 litres. 25% of the water is used. How many litres are left?
  25. 25.A water tank holds 460 litres. 50% of the water is used. How many litres are left?
  26. 26.A water tank holds 1380 litres. 40% of the water is used. How many litres are left?
  27. 27.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  28. 28.A town has 2860 people. Its population grows by 20%. How many people live there now?
  29. 29.The price of a bicycle is ₹3660. It goes up by 10%. What is the new price (in ₹)?
  30. 30.A shop sells 2120 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  31. 31.A town has 3840 people. Its population grows by 15%. How many people live there now?
  32. 32.The price of a bicycle is ₹4960. It goes up by 20%. What is the new price (in ₹)?
  33. 33.The price of a bicycle is ₹3840. It goes up by 30%. What is the new price (in ₹)?
  34. 34.A water tank holds 400 litres. 30% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹2900 to ₹3480. By what percent did it go up?
  36. 36.A water tank holds 300 litres. 10% of the water is used. How many litres are left?
  37. 37.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =
  38. 38.A price comes down by 5% and then comes down by 40% more. By what percent has it come down in all? =
  39. 39.A price goes up by 30% and then comes down by 15%. By what percent has it gone up in all? =
  40. 40.The price of a school bag changes from ₹4980 to ₹5229. By what percent did it go up?

Answer key

  1. 1264
  2. 2300
  3. 20.75
  4. 1792
  5. 728
  6. 37.5
  7. 43.75
  8. 15
  9. 476
  10. 1926
  11. 1406
  12. 25
  13. 1248
  14. 2625
  15. 62.5
  16. 5208
  17. 3120
  18. 47
  19. 4368
  20. 50
  21. 10
  22. 625
  23. 5
  24. 3390
  25. 230
  26. 828
  27. 3.5
  28. 3432
  29. 4026
  30. 2650
  31. 4416
  32. 5952
  33. 4992
  34. 280
  35. 20
  36. 270
  37. 87.5
  38. 43
  39. 10.5
  40. 5

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