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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 551 · 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 ₹780 to ₹975. By what percent did it go up?
  2. 2.A shop sells 2140 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  3. 3.A water tank holds 480 litres. 25% of the water is used. How many litres are left?
  4. 4.A town has 1240 people. Its population grows by 50%. How many people live there now?
  5. 5.A town has 1940 people. Its population grows by 50%. How many people live there now?
  6. 6.A price comes down by 40% and then comes down by 15% more. By what percent has it come down in all? =
  7. 7.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
  8. 8.A shop sells 4340 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  9. 9.A water tank holds 2700 litres. 5% of the water is used. How many litres are left?
  10. 10.A water tank holds 500 litres. 40% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹1540 to ₹1386. By what percent did it come down?
  12. 12.A shop sells 2060 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  13. 13.A water tank holds 4180 litres. 25% of the water is used. How many litres are left?
  14. 14.A price comes down by 5% and then comes down by 30% more. By what percent has it come down in all? =
  15. 15.The price of a bicycle is ₹2720. It goes up by 10%. What is the new price (in ₹)?
  16. 16.The price of a school bag changes from ₹300 to ₹345. By what percent did it go up?
  17. 17.The price of a school bag changes from ₹4060 to ₹3654. By what percent did it come down?
  18. 18.A water tank holds 660 litres. 40% of the water is used. How many litres are left?
  19. 19.The price of a school bag changes from ₹3000 to ₹3600. By what percent did it go up?
  20. 20.The price of a school bag changes from ₹2980 to ₹4172. By what percent did it go up?
  21. 21.A water tank holds 1060 litres. 50% of the water is used. How many litres are left?
  22. 22.A price comes down by 30% and then comes down by 20% more. By what percent has it come down in all? =
  23. 23.The price of a school bag changes from ₹4600 to ₹4140. By what percent did it come down?
  24. 24.A town has 3460 people. Its population grows by 5%. How many people live there now?
  25. 25.A water tank holds 3440 litres. 5% of the water is used. How many litres are left?
  26. 26.A town has 920 people. Its population grows by 5%. How many people live there now?
  27. 27.The price of a school bag changes from ₹4000 to ₹2800. By what percent did it come down?
  28. 28.The price of a school bag changes from ₹1180 to ₹826. By what percent did it come down?
  29. 29.A town has 3040 people. Its population grows by 50%. How many people live there now?
  30. 30.The price of a school bag changes from ₹2220 to ₹1665. By what percent did it come down?
  31. 31.The price of a school bag changes from ₹460 to ₹483. By what percent did it go up?
  32. 32.The price of a bicycle is ₹4700. It goes up by 30%. What is the new price (in ₹)?
  33. 33.The price of a school bag changes from ₹3020 to ₹2567. By what percent did it come down?
  34. 34.A town has 100 people. Its population grows by 10%. How many people live there now?
  35. 35.The price of a bicycle is ₹120. It goes up by 10%. What is the new price (in ₹)?
  36. 36.The price of a school bag changes from ₹4880 to ₹3660. By what percent did it come down?
  37. 37.A water tank holds 2920 litres. 10% of the water is used. How many litres are left?
  38. 38.A water tank holds 4400 litres. 25% of the water is used. How many litres are left?
  39. 39.A town has 1520 people. Its population grows by 15%. How many people live there now?
  40. 40.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =

Answer key

  1. 25
  2. 2247
  3. 360
  4. 1860
  5. 2910
  6. 49
  7. 33
  8. 4991
  9. 2565
  10. 300
  11. 10
  12. 3090
  13. 3135
  14. 33.5
  15. 2992
  16. 15
  17. 10
  18. 396
  19. 20
  20. 40
  21. 530
  22. 44
  23. 10
  24. 3633
  25. 3268
  26. 966
  27. 30
  28. 30
  29. 4560
  30. 25
  31. 5
  32. 6110
  33. 15
  34. 110
  35. 132
  36. 25
  37. 2628
  38. 3300
  39. 1748
  40. 43

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