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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 390 · 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 2780 litres. 30% of the water is used. How many litres are left?
  2. 2.A water tank holds 720 litres. 15% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹4940 to ₹5434. By what percent did it go up?
  4. 4.A water tank holds 4480 litres. 50% of the water is used. How many litres are left?
  5. 5.The price of a bicycle is ₹4280. It goes up by 25%. What is the new price (in ₹)?
  6. 6.A water tank holds 1500 litres. 40% of the water is used. How many litres are left?
  7. 7.A price goes up by 40% and then comes down by 10%. By what percent has it gone up in all? =
  8. 8.A price goes up by 10% and then goes up by 20% more. By what percent has it gone up in all? =
  9. 9.A water tank holds 580 litres. 10% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹220 to ₹110. By what percent did it come down?
  11. 11.The price of a school bag changes from ₹4320 to ₹3024. By what percent did it come down?
  12. 12.A water tank holds 4920 litres. 5% of the water is used. How many litres are left?
  13. 13.The price of a bicycle is ₹3040. It goes up by 15%. What is the new price (in ₹)?
  14. 14.The price of a school bag changes from ₹280 to ₹168. By what percent did it come down?
  15. 15.The price of a school bag changes from ₹840 to ₹1176. By what percent did it go up?
  16. 16.A town has 1360 people. Its population grows by 10%. How many people live there now?
  17. 17.A shop sells 3620 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  18. 18.The price of a school bag changes from ₹1120 to ₹1680. By what percent did it go up?
  19. 19.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  20. 20.The price of a school bag changes from ₹4020 to ₹2814. By what percent did it come down?
  21. 21.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
  22. 22.The price of a school bag changes from ₹1800 to ₹2070. By what percent did it go up?
  23. 23.A water tank holds 960 litres. 30% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹1000 to ₹500. By what percent did it come down?
  25. 25.The price of a school bag changes from ₹3740 to ₹2618. By what percent did it come down?
  26. 26.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  27. 27.A price goes up by 30% and then comes down by 15%. By what percent has it gone up in all? =
  28. 28.A water tank holds 840 litres. 10% of the water is used. How many litres are left?
  29. 29.A water tank holds 2460 litres. 15% of the water is used. How many litres are left?
  30. 30.A water tank holds 3940 litres. 30% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹4260 to ₹5112. By what percent did it go up?
  32. 32.A water tank holds 3540 litres. 15% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹4280 to ₹2996. By what percent did it come down?
  34. 34.A shop sells 3560 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  35. 35.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
  36. 36.The price of a bicycle is ₹780. It goes up by 40%. What is the new price (in ₹)?
  37. 37.A shop sells 620 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  38. 38.A water tank holds 1740 litres. 25% of the water is used. How many litres are left?
  39. 39.A water tank holds 740 litres. 20% of the water is used. How many litres are left?
  40. 40.A water tank holds 4800 litres. 5% of the water is used. How many litres are left?

Answer key

  1. 1946
  2. 612
  3. 10
  4. 2240
  5. 5350
  6. 900
  7. 26
  8. 32
  9. 522
  10. 50
  11. 30
  12. 4674
  13. 3496
  14. 40
  15. 40
  16. 1496
  17. 3801
  18. 50
  19. 10.25
  20. 30
  21. 24
  22. 15
  23. 672
  24. 50
  25. 30
  26. 47.5
  27. 10.5
  28. 756
  29. 2091
  30. 2758
  31. 20
  32. 3009
  33. 30
  34. 4450
  35. 49.5
  36. 1092
  37. 930
  38. 1305
  39. 592
  40. 4560

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