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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 878 · 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 ₹2540 to ₹2032. By what percent did it come down?
  2. 2.A water tank holds 1040 litres. 5% of the water is used. How many litres are left?
  3. 3.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  4. 4.The price of a bicycle is ₹2000. It goes up by 20%. What is the new price (in ₹)?
  5. 5.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =
  6. 6.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  7. 7.The price of a school bag changes from ₹1400 to ₹1540. By what percent did it go up?
  8. 8.The price of a bicycle is ₹260. It goes up by 10%. What is the new price (in ₹)?
  9. 9.The price of a bicycle is ₹4380. It goes up by 5%. What is the new price (in ₹)?
  10. 10.A town has 300 people. Its population grows by 15%. How many people live there now?
  11. 11.The price of a school bag changes from ₹1960 to ₹2156. By what percent did it go up?
  12. 12.A town has 3460 people. Its population grows by 50%. How many people live there now?
  13. 13.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  14. 14.A water tank holds 620 litres. 25% of the water is used. How many litres are left?
  15. 15.A water tank holds 2520 litres. 10% of the water is used. How many litres are left?
  16. 16.A water tank holds 920 litres. 50% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹1660 to ₹1245. By what percent did it come down?
  18. 18.The price of a bicycle is ₹380. It goes up by 20%. What is the new price (in ₹)?
  19. 19.A price comes down by 30% and then comes down by 15% more. By what percent has it come down in all? =
  20. 20.A price comes down by 30% and then comes down by 50% more. By what percent has it come down in all? =
  21. 21.A shop sells 1380 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  22. 22.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  23. 23.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  24. 24.A water tank holds 4960 litres. 30% of the water is used. How many litres are left?
  25. 25.A water tank holds 2040 litres. 30% of the water is used. How many litres are left?
  26. 26.A shop sells 3800 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  27. 27.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =
  28. 28.The price of a school bag changes from ₹2820 to ₹2538. By what percent did it come down?
  29. 29.A town has 4980 people. Its population grows by 30%. How many people live there now?
  30. 30.A price comes down by 50% and then comes down by 30% more. By what percent has it come down in all? =
  31. 31.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  32. 32.A water tank holds 1000 litres. 5% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹280 to ₹350. By what percent did it go up?
  34. 34.The price of a school bag changes from ₹2760 to ₹3588. By what percent did it go up?
  35. 35.The price of a school bag changes from ₹2400 to ₹2520. By what percent did it go up?
  36. 36.A water tank holds 780 litres. 15% of the water is used. How many litres are left?
  37. 37.The price of a bicycle is ₹3800. It goes up by 10%. What is the new price (in ₹)?
  38. 38.A town has 4380 people. Its population grows by 30%. How many people live there now?
  39. 39.A water tank holds 4740 litres. 30% of the water is used. How many litres are left?
  40. 40.The price of a school bag changes from ₹180 to ₹216. By what percent did it go up?

Answer key

  1. 20
  2. 988
  3. 36.25
  4. 2400
  5. 28
  6. 54
  7. 10
  8. 286
  9. 4599
  10. 345
  11. 10
  12. 5190
  13. 43.75
  14. 465
  15. 2268
  16. 460
  17. 25
  18. 456
  19. 40.5
  20. 65
  21. 1725
  22. 21
  23. 19
  24. 3472
  25. 1428
  26. 4940
  27. 87.5
  28. 10
  29. 6474
  30. 65
  31. 37
  32. 950
  33. 25
  34. 30
  35. 5
  36. 663
  37. 4180
  38. 5694
  39. 3318
  40. 20

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