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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 626 · 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 shop sells 4540 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  2. 2.A water tank holds 3140 litres. 30% of the water is used. How many litres are left?
  3. 3.A town has 4540 people. Its population grows by 30%. How many people live there now?
  4. 4.The price of a school bag changes from ₹1380 to ₹1035. By what percent did it come down?
  5. 5.A shop sells 3900 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  6. 6.The price of a school bag changes from ₹220 to ₹308. By what percent did it go up?
  7. 7.A price comes down by 25% and then comes down by 40% more. By what percent has it come down in all? =
  8. 8.The price of a school bag changes from ₹320 to ₹416. By what percent did it go up?
  9. 9.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  10. 10.A price goes up by 10% and then goes up by 20% more. By what percent has it gone up in all? =
  11. 11.A town has 2660 people. Its population grows by 40%. How many people live there now?
  12. 12.A shop sells 940 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  13. 13.A water tank holds 1620 litres. 15% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹2920 to ₹3796. By what percent did it go up?
  15. 15.A town has 1240 people. Its population grows by 20%. How many people live there now?
  16. 16.A water tank holds 360 litres. 10% of the water is used. How many litres are left?
  17. 17.A town has 600 people. Its population grows by 40%. How many people live there now?
  18. 18.The price of a school bag changes from ₹860 to ₹602. By what percent did it come down?
  19. 19.A water tank holds 340 litres. 15% of the water is used. How many litres are left?
  20. 20.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  21. 21.A water tank holds 2080 litres. 40% of the water is used. How many litres are left?
  22. 22.The price of a school bag changes from ₹4060 to ₹4669. By what percent did it go up?
  23. 23.The price of a bicycle is ₹4340. It goes up by 20%. What is the new price (in ₹)?
  24. 24.A water tank holds 2460 litres. 10% of the water is used. How many litres are left?
  25. 25.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  26. 26.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  27. 27.The price of a school bag changes from ₹4040 to ₹4444. By what percent did it go up?
  28. 28.A shop sells 380 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  29. 29.A shop sells 380 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  30. 30.The price of a school bag changes from ₹340 to ₹391. By what percent did it go up?
  31. 31.The price of a school bag changes from ₹1860 to ₹2418. By what percent did it go up?
  32. 32.A town has 4160 people. Its population grows by 10%. How many people live there now?
  33. 33.A town has 360 people. Its population grows by 30%. How many people live there now?
  34. 34.The price of a school bag changes from ₹1320 to ₹1386. By what percent did it go up?
  35. 35.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  36. 36.A price comes down by 20% and then comes down by 20% more. By what percent has it come down in all? =
  37. 37.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  38. 38.The price of a school bag changes from ₹1500 to ₹1650. By what percent did it go up?
  39. 39.A water tank holds 360 litres. 30% of the water is used. How many litres are left?
  40. 40.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =

Answer key

  1. 4994
  2. 2198
  3. 5902
  4. 25
  5. 5070
  6. 40
  7. 55
  8. 30
  9. 4.5
  10. 32
  11. 3724
  12. 1034
  13. 1377
  14. 30
  15. 1488
  16. 324
  17. 840
  18. 30
  19. 289
  20. 46
  21. 1248
  22. 15
  23. 5208
  24. 2214
  25. 47
  26. 43
  27. 10
  28. 494
  29. 570
  30. 15
  31. 30
  32. 4576
  33. 468
  34. 5
  35. 33.5
  36. 36
  37. 75
  38. 10
  39. 252
  40. 15.5

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