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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 621 · 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 price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  2. 2.A water tank holds 1220 litres. 5% of the water is used. How many litres are left?
  3. 3.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
  4. 4.A town has 600 people. Its population grows by 30%. How many people live there now?
  5. 5.A water tank holds 2500 litres. 40% of the water is used. How many litres are left?
  6. 6.A town has 1200 people. Its population grows by 20%. How many people live there now?
  7. 7.A town has 1480 people. Its population grows by 50%. How many people live there now?
  8. 8.A shop sells 2680 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  9. 9.A town has 2520 people. Its population grows by 50%. How many people live there now?
  10. 10.A water tank holds 680 litres. 25% of the water is used. How many litres are left?
  11. 11.The price of a bicycle is ₹4940. It goes up by 50%. What is the new price (in ₹)?
  12. 12.A water tank holds 3180 litres. 5% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹4280 to ₹5564. By what percent did it go up?
  14. 14.The price of a bicycle is ₹2560. It goes up by 15%. What is the new price (in ₹)?
  15. 15.The price of a school bag changes from ₹3080 to ₹3234. By what percent did it go up?
  16. 16.The price of a school bag changes from ₹3560 to ₹4984. By what percent did it go up?
  17. 17.The price of a bicycle is ₹1240. It goes up by 20%. What is the new price (in ₹)?
  18. 18.A price comes down by 20% and then comes down by 20% more. By what percent has it come down in all? =
  19. 19.A shop sells 1800 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  20. 20.A shop sells 2800 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  21. 21.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  22. 22.A town has 3520 people. Its population grows by 30%. How many people live there now?
  23. 23.A shop sells 3900 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  24. 24.A price goes up by 30% and then comes down by 15%. By what percent has it gone up in all? =
  25. 25.The price of a school bag changes from ₹4100 to ₹4920. By what percent did it go up?
  26. 26.The price of a school bag changes from ₹160 to ₹176. By what percent did it go up?
  27. 27.The price of a school bag changes from ₹1540 to ₹770. By what percent did it come down?
  28. 28.A water tank holds 680 litres. 40% of the water is used. How many litres are left?
  29. 29.The price of a bicycle is ₹4280. It goes up by 30%. What is the new price (in ₹)?
  30. 30.A town has 1400 people. Its population grows by 10%. How many people live there now?
  31. 31.The price of a bicycle is ₹4400. It goes up by 15%. What is the new price (in ₹)?
  32. 32.A town has 1360 people. Its population grows by 5%. How many people live there now?
  33. 33.The price of a school bag changes from ₹460 to ₹391. By what percent did it come down?
  34. 34.A price goes up by 50% and then comes down by 5%. By what percent has it gone up in all? =
  35. 35.The price of a school bag changes from ₹3840 to ₹5376. By what percent did it go up?
  36. 36.A water tank holds 2680 litres. 30% of the water is used. How many litres are left?
  37. 37.A town has 1620 people. Its population grows by 5%. How many people live there now?
  38. 38.A water tank holds 1600 litres. 15% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹480 to ₹672. By what percent did it go up?
  40. 40.A water tank holds 4120 litres. 20% of the water is used. How many litres are left?

Answer key

  1. 55
  2. 1159
  3. 24
  4. 780
  5. 1500
  6. 1440
  7. 2220
  8. 2814
  9. 3780
  10. 510
  11. 7410
  12. 3021
  13. 30
  14. 2944
  15. 5
  16. 40
  17. 1488
  18. 36
  19. 1890
  20. 2940
  21. 65
  22. 4576
  23. 5850
  24. 10.5
  25. 20
  26. 10
  27. 50
  28. 408
  29. 5564
  30. 1540
  31. 5060
  32. 1428
  33. 15
  34. 42.5
  35. 40
  36. 1876
  37. 1701
  38. 1360
  39. 40
  40. 3296

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