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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 845 · 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 water tank holds 1060 litres. 30% of the water is used. How many litres are left?
  2. 2.A shop sells 1480 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  3. 3.A price goes up by 40% and then comes down by 25%. By what percent has it gone up in all? =
  4. 4.The price of a school bag changes from ₹3220 to ₹2576. By what percent did it come down?
  5. 5.A water tank holds 160 litres. 25% of the water is used. How many litres are left?
  6. 6.The price of a bicycle is ₹3740. It goes up by 30%. What is the new price (in ₹)?
  7. 7.A water tank holds 1980 litres. 40% of the water is used. How many litres are left?
  8. 8.A price goes up by 10% and then goes up by 20% more. By what percent has it gone up in all? =
  9. 9.The price of a school bag changes from ₹2060 to ₹1751. By what percent did it come down?
  10. 10.A town has 700 people. Its population grows by 10%. How many people live there now?
  11. 11.A water tank holds 1080 litres. 5% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹160 to ₹240. By what percent did it go up?
  13. 13.The price of a bicycle is ₹4100. It goes up by 15%. What is the new price (in ₹)?
  14. 14.A town has 300 people. Its population grows by 15%. How many people live there now?
  15. 15.The price of a bicycle is ₹3680. It goes up by 15%. What is the new price (in ₹)?
  16. 16.The price of a school bag changes from ₹4320 to ₹3240. By what percent did it come down?
  17. 17.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
  18. 18.A shop sells 4820 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  19. 19.The price of a school bag changes from ₹2440 to ₹2684. By what percent did it go up?
  20. 20.The price of a school bag changes from ₹1060 to ₹1166. By what percent did it go up?
  21. 21.A price comes down by 40% and then comes down by 50% more. By what percent has it come down in all? =
  22. 22.A price goes up by 40% and then comes down by 15%. By what percent has it gone up in all? =
  23. 23.A water tank holds 940 litres. 25% of the water is used. How many litres are left?
  24. 24.A water tank holds 2960 litres. 20% of the water is used. How many litres are left?
  25. 25.A water tank holds 4140 litres. 20% of the water is used. How many litres are left?
  26. 26.A town has 2280 people. Its population grows by 20%. How many people live there now?
  27. 27.The price of a bicycle is ₹4500. It goes up by 50%. What is the new price (in ₹)?
  28. 28.A town has 4260 people. Its population grows by 10%. How many people live there now?
  29. 29.A water tank holds 4780 litres. 20% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹2580 to ₹3354. By what percent did it go up?
  31. 31.A shop sells 3240 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  32. 32.The price of a school bag changes from ₹4660 to ₹3262. By what percent did it come down?
  33. 33.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  34. 34.The price of a bicycle is ₹320. It goes up by 25%. What is the new price (in ₹)?
  35. 35.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  36. 36.The price of a bicycle is ₹620. It goes up by 30%. What is the new price (in ₹)?
  37. 37.The price of a bicycle is ₹1880. It goes up by 5%. What is the new price (in ₹)?
  38. 38.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  39. 39.A water tank holds 2340 litres. 30% of the water is used. How many litres are left?
  40. 40.The price of a bicycle is ₹4960. It goes up by 25%. What is the new price (in ₹)?

Answer key

  1. 742
  2. 1628
  3. 5
  4. 20
  5. 120
  6. 4862
  7. 1188
  8. 32
  9. 15
  10. 770
  11. 1026
  12. 50
  13. 4715
  14. 345
  15. 4232
  16. 25
  17. 47
  18. 6748
  19. 10
  20. 10
  21. 70
  22. 19
  23. 705
  24. 2368
  25. 3312
  26. 2736
  27. 6750
  28. 4686
  29. 3824
  30. 30
  31. 3726
  32. 30
  33. 20.75
  34. 400
  35. 56
  36. 806
  37. 1974
  38. 10.25
  39. 1638
  40. 6200

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