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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 611 · 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 ₹4740 to ₹6636. By what percent did it go up?
  2. 2.A water tank holds 940 litres. 5% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹940 to ₹1034. By what percent did it go up?
  4. 4.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  5. 5.A shop sells 2380 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  6. 6.The price of a school bag changes from ₹4800 to ₹4320. By what percent did it come down?
  7. 7.A water tank holds 3300 litres. 10% of the water is used. How many litres are left?
  8. 8.A water tank holds 4720 litres. 5% of the water is used. How many litres are left?
  9. 9.A water tank holds 1380 litres. 50% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹1400 to ₹1610. By what percent did it go up?
  11. 11.A water tank holds 4260 litres. 5% of the water is used. How many litres are left?
  12. 12.A price goes up by 25% and then goes up by 40% more. By what percent has it gone up in all? =
  13. 13.A town has 1020 people. Its population grows by 5%. How many people live there now?
  14. 14.A shop sells 2320 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  15. 15.A price goes up by 40% and then comes down by 20%. By what percent has it gone up in all? =
  16. 16.The price of a bicycle is ₹1520. It goes up by 50%. What is the new price (in ₹)?
  17. 17.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
  18. 18.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  19. 19.The price of a school bag changes from ₹3360 to ₹2352. By what percent did it come down?
  20. 20.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  21. 21.A water tank holds 4040 litres. 20% of the water is used. How many litres are left?
  22. 22.The price of a school bag changes from ₹3800 to ₹4560. By what percent did it go up?
  23. 23.A shop sells 2840 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  24. 24.A water tank holds 180 litres. 30% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹1160 to ₹1044. By what percent did it come down?
  26. 26.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  27. 27.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  28. 28.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
  29. 29.The price of a school bag changes from ₹660 to ₹528. By what percent did it come down?
  30. 30.A water tank holds 1760 litres. 40% of the water is used. How many litres are left?
  31. 31.A price goes up by 40% and then goes up by 50% more. By what percent has it gone up in all? =
  32. 32.A water tank holds 2080 litres. 40% of the water is used. How many litres are left?
  33. 33.A town has 2160 people. Its population grows by 10%. How many people live there now?
  34. 34.A town has 4100 people. Its population grows by 5%. How many people live there now?
  35. 35.A shop sells 720 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  36. 36.A water tank holds 3400 litres. 15% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹4280 to ₹4708. By what percent did it go up?
  38. 38.A price comes down by 20% and then comes down by 30% more. By what percent has it come down in all? =
  39. 39.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  40. 40.A shop sells 1460 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?

Answer key

  1. 40
  2. 893
  3. 10
  4. 65
  5. 2737
  6. 10
  7. 2970
  8. 4484
  9. 690
  10. 15
  11. 4047
  12. 75
  13. 1071
  14. 2436
  15. 12
  16. 2280
  17. 20
  18. 72.5
  19. 30
  20. 27.5
  21. 3232
  22. 20
  23. 3408
  24. 126
  25. 10
  26. 14.5
  27. 10.25
  28. 32.5
  29. 20
  30. 1056
  31. 110
  32. 1248
  33. 2376
  34. 4305
  35. 936
  36. 2890
  37. 10
  38. 44
  39. 61
  40. 1679

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