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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 270 · 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 3460 litres. 10% of the water is used. How many litres are left?
  2. 2.A water tank holds 1500 litres. 10% of the water is used. How many litres are left?
  3. 3.A water tank holds 740 litres. 25% of the water is used. How many litres are left?
  4. 4.A water tank holds 2200 litres. 20% of the water is used. How many litres are left?
  5. 5.A water tank holds 240 litres. 10% of the water is used. How many litres are left?
  6. 6.The price of a school bag changes from ₹3720 to ₹4278. By what percent did it go up?
  7. 7.The price of a school bag changes from ₹460 to ₹483. By what percent did it go up?
  8. 8.A water tank holds 1360 litres. 15% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹2920 to ₹2336. By what percent did it come down?
  10. 10.A price comes down by 20% and then comes down by 25% more. By what percent has it come down in all? =
  11. 11.The price of a school bag changes from ₹540 to ₹702. By what percent did it go up?
  12. 12.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  13. 13.A water tank holds 2780 litres. 20% of the water is used. How many litres are left?
  14. 14.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  15. 15.A water tank holds 2520 litres. 15% of the water is used. How many litres are left?
  16. 16.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =
  17. 17.The price of a bicycle is ₹2040. It goes up by 40%. What is the new price (in ₹)?
  18. 18.A water tank holds 360 litres. 30% of the water is used. How many litres are left?
  19. 19.A water tank holds 700 litres. 15% of the water is used. How many litres are left?
  20. 20.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  21. 21.A shop sells 680 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  22. 22.A shop sells 1620 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  23. 23.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  24. 24.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  25. 25.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  26. 26.The price of a bicycle is ₹3960. It goes up by 30%. What is the new price (in ₹)?
  27. 27.The price of a school bag changes from ₹1020 to ₹1530. By what percent did it go up?
  28. 28.A water tank holds 4920 litres. 40% of the water is used. How many litres are left?
  29. 29.A water tank holds 1440 litres. 50% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹5000 to ₹7500. By what percent did it go up?
  31. 31.A water tank holds 1980 litres. 15% of the water is used. How many litres are left?
  32. 32.A water tank holds 3800 litres. 5% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹3160 to ₹3318. By what percent did it go up?
  34. 34.The price of a bicycle is ₹3020. It goes up by 10%. What is the new price (in ₹)?
  35. 35.A shop sells 3820 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  36. 36.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  37. 37.The price of a school bag changes from ₹2220 to ₹1332. By what percent did it come down?
  38. 38.A shop sells 4000 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  39. 39.A shop sells 3540 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  40. 40.A water tank holds 2900 litres. 40% of the water is used. How many litres are left?

Answer key

  1. 3114
  2. 1350
  3. 555
  4. 1760
  5. 216
  6. 15
  7. 5
  8. 1156
  9. 20
  10. 40
  11. 30
  12. 55
  13. 2224
  14. 4.5
  15. 2142
  16. 43
  17. 2856
  18. 252
  19. 595
  20. 95
  21. 952
  22. 2430
  23. 20.75
  24. 62.5
  25. 61
  26. 5148
  27. 50
  28. 2952
  29. 720
  30. 50
  31. 1683
  32. 3610
  33. 5
  34. 3322
  35. 5348
  36. 52.5
  37. 40
  38. 4200
  39. 4071
  40. 1740

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