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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 708 · 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 ₹3300 to ₹3465. By what percent did it go up?
  2. 2.A water tank holds 3140 litres. 5% of the water is used. How many litres are left?
  3. 3.A shop sells 4400 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  4. 4.A price goes up by 30% and then goes up by 30% more. By what percent has it gone up in all? =
  5. 5.A water tank holds 4220 litres. 5% of the water is used. How many litres are left?
  6. 6.The price of a bicycle is ₹760. It goes up by 20%. What is the new price (in ₹)?
  7. 7.A water tank holds 3800 litres. 5% of the water is used. How many litres are left?
  8. 8.A shop sells 2080 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  9. 9.The price of a bicycle is ₹940. It goes up by 30%. What is the new price (in ₹)?
  10. 10.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  11. 11.The price of a school bag changes from ₹220 to ₹165. By what percent did it come down?
  12. 12.A price goes up by 20% and then goes up by 20% more. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹2620 to ₹2751. By what percent did it go up?
  14. 14.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  15. 15.A shop sells 4940 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  16. 16.A price comes down by 25% and then comes down by 40% more. By what percent has it come down in all? =
  17. 17.A price comes down by 40% and then comes down by 30% more. By what percent has it come down in all? =
  18. 18.The price of a school bag changes from ₹4000 to ₹4800. By what percent did it go up?
  19. 19.A water tank holds 1640 litres. 40% of the water is used. How many litres are left?
  20. 20.A water tank holds 1460 litres. 20% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹2980 to ₹3725. By what percent did it go up?
  22. 22.A price comes down by 20% and then comes down by 30% more. By what percent has it come down in all? =
  23. 23.The price of a school bag changes from ₹2520 to ₹2394. By what percent did it come down?
  24. 24.The price of a school bag changes from ₹900 to ₹1035. By what percent did it go up?
  25. 25.A water tank holds 1460 litres. 5% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹480 to ₹288. By what percent did it come down?
  27. 27.A town has 1360 people. Its population grows by 30%. How many people live there now?
  28. 28.A town has 1160 people. Its population grows by 50%. How many people live there now?
  29. 29.The price of a bicycle is ₹4760. It goes up by 40%. What is the new price (in ₹)?
  30. 30.The price of a bicycle is ₹4740. It goes up by 5%. What is the new price (in ₹)?
  31. 31.The price of a school bag changes from ₹1380 to ₹1242. By what percent did it come down?
  32. 32.The price of a school bag changes from ₹520 to ₹494. By what percent did it come down?
  33. 33.The price of a school bag changes from ₹3520 to ₹4224. By what percent did it go up?
  34. 34.A town has 3480 people. Its population grows by 15%. How many people live there now?
  35. 35.A water tank holds 4800 litres. 10% of the water is used. How many litres are left?
  36. 36.A town has 3840 people. Its population grows by 30%. How many people live there now?
  37. 37.A water tank holds 80 litres. 5% of the water is used. How many litres are left?
  38. 38.A water tank holds 2640 litres. 20% of the water is used. How many litres are left?
  39. 39.A water tank holds 3360 litres. 5% of the water is used. How many litres are left?
  40. 40.A water tank holds 4520 litres. 5% of the water is used. How many litres are left?

Answer key

  1. 5
  2. 2983
  3. 5280
  4. 69
  5. 4009
  6. 912
  7. 3610
  8. 2600
  9. 1222
  10. 8
  11. 25
  12. 44
  13. 5
  14. 32
  15. 5187
  16. 55
  17. 58
  18. 20
  19. 984
  20. 1168
  21. 25
  22. 44
  23. 5
  24. 15
  25. 1387
  26. 40
  27. 1768
  28. 1740
  29. 6664
  30. 4977
  31. 10
  32. 5
  33. 20
  34. 4002
  35. 4320
  36. 4992
  37. 76
  38. 2112
  39. 3192
  40. 4294

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