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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 440 · 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 5% and then comes down by 10% more. By what percent has it come down in all? =
  2. 2.A water tank holds 3040 litres. 25% of the water is used. How many litres are left?
  3. 3.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
  4. 4.A price comes down by 25% and then comes down by 30% more. By what percent has it come down in all? =
  5. 5.A price comes down by 20% and then comes down by 20% more. By what percent has it come down in all? =
  6. 6.A town has 1180 people. Its population grows by 50%. How many people live there now?
  7. 7.A water tank holds 4880 litres. 25% of the water is used. How many litres are left?
  8. 8.A price comes down by 25% and then comes down by 40% more. By what percent has it come down in all? =
  9. 9.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
  10. 10.A price comes down by 15% and then comes down by 5% more. By what percent has it come down in all? =
  11. 11.The price of a bicycle is ₹3100. It goes up by 15%. What is the new price (in ₹)?
  12. 12.A price comes down by 20% and then comes down by 15% more. By what percent has it come down in all? =
  13. 13.The price of a school bag changes from ₹1520 to ₹1444. By what percent did it come down?
  14. 14.The price of a school bag changes from ₹4060 to ₹2436. By what percent did it come down?
  15. 15.The price of a school bag changes from ₹200 to ₹260. By what percent did it go up?
  16. 16.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  17. 17.A price comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =
  18. 18.A town has 2200 people. Its population grows by 50%. How many people live there now?
  19. 19.A shop sells 3000 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  20. 20.A water tank holds 560 litres. 5% of the water is used. How many litres are left?
  21. 21.A price goes up by 25% and then comes down by 10%. By what percent has it gone up in all? =
  22. 22.A shop sells 1060 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  23. 23.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =
  24. 24.A price comes down by 40% and then comes down by 40% more. By what percent has it come down in all? =
  25. 25.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =
  26. 26.A price goes up by 30% and then goes up by 15% more. By what percent has it gone up in all? =
  27. 27.The price of a school bag changes from ₹680 to ₹612. By what percent did it come down?
  28. 28.The price of a school bag changes from ₹4660 to ₹5126. By what percent did it go up?
  29. 29.A water tank holds 2480 litres. 40% of the water is used. How many litres are left?
  30. 30.A water tank holds 1040 litres. 50% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹2840 to ₹2982. By what percent did it go up?
  32. 32.The price of a school bag changes from ₹1400 to ₹2100. By what percent did it go up?
  33. 33.A water tank holds 2720 litres. 40% of the water is used. How many litres are left?
  34. 34.The price of a bicycle is ₹3100. It goes up by 10%. What is the new price (in ₹)?
  35. 35.The price of a bicycle is ₹160. It goes up by 15%. What is the new price (in ₹)?
  36. 36.The price of a school bag changes from ₹4400 to ₹4620. By what percent did it go up?
  37. 37.A water tank holds 600 litres. 15% of the water is used. How many litres are left?
  38. 38.A water tank holds 4240 litres. 15% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹3020 to ₹3473. By what percent did it go up?
  40. 40.The price of a school bag changes from ₹1880 to ₹1974. By what percent did it go up?

Answer key

  1. 14.5
  2. 2280
  3. 20
  4. 47.5
  5. 36
  6. 1770
  7. 3660
  8. 55
  9. 33
  10. 19.25
  11. 3565
  12. 32
  13. 5
  14. 40
  15. 30
  16. 95
  17. 51
  18. 3300
  19. 3150
  20. 532
  21. 12.5
  22. 1219
  23. 87.5
  24. 64
  25. 32
  26. 49.5
  27. 10
  28. 10
  29. 1488
  30. 520
  31. 5
  32. 50
  33. 1632
  34. 3410
  35. 184
  36. 5
  37. 510
  38. 3604
  39. 15
  40. 5

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