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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 190 · 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 goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  2. 2.The price of a school bag changes from ₹4440 to ₹4218. By what percent did it come down?
  3. 3.A water tank holds 4440 litres. 50% of the water is used. How many litres are left?
  4. 4.A water tank holds 4480 litres. 50% of the water is used. How many litres are left?
  5. 5.A water tank holds 3020 litres. 50% of the water is used. How many litres are left?
  6. 6.The price of a school bag changes from ₹3520 to ₹4928. By what percent did it go up?
  7. 7.A price goes up by 25% and then comes down by 15%. By what percent has it gone up in all? =
  8. 8.A water tank holds 2920 litres. 20% of the water is used. How many litres are left?
  9. 9.A town has 1140 people. Its population grows by 40%. How many people live there now?
  10. 10.A water tank holds 2840 litres. 15% of the water is used. How many litres are left?
  11. 11.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
  12. 12.The price of a school bag changes from ₹3560 to ₹3738. By what percent did it go up?
  13. 13.A shop sells 3580 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  14. 14.The price of a bicycle is ₹1920. It goes up by 25%. What is the new price (in ₹)?
  15. 15.A water tank holds 1520 litres. 10% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹1560 to ₹1950. By what percent did it go up?
  17. 17.The price of a school bag changes from ₹3080 to ₹3234. By what percent did it go up?
  18. 18.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =
  19. 19.A water tank holds 4360 litres. 30% of the water is used. How many litres are left?
  20. 20.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  21. 21.A water tank holds 720 litres. 10% of the water is used. How many litres are left?
  22. 22.A shop sells 960 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  23. 23.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  24. 24.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  25. 25.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  26. 26.A shop sells 3040 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  27. 27.A water tank holds 3220 litres. 10% of the water is used. How many litres are left?
  28. 28.A town has 4140 people. Its population grows by 20%. How many people live there now?
  29. 29.The price of a bicycle is ₹2820. It goes up by 10%. What is the new price (in ₹)?
  30. 30.A shop sells 4400 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  31. 31.The price of a school bag changes from ₹1980 to ₹2178. By what percent did it go up?
  32. 32.The price of a school bag changes from ₹2840 to ₹4260. By what percent did it go up?
  33. 33.A water tank holds 2800 litres. 5% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹3520 to ₹4576. By what percent did it go up?
  35. 35.The price of a bicycle is ₹4940. It goes up by 20%. What is the new price (in ₹)?
  36. 36.The price of a school bag changes from ₹2620 to ₹1310. By what percent did it come down?
  37. 37.A water tank holds 4200 litres. 5% of the water is used. How many litres are left?
  38. 38.A town has 1120 people. Its population grows by 25%. How many people live there now?
  39. 39.A water tank holds 3800 litres. 40% of the water is used. How many litres are left?
  40. 40.A water tank holds 920 litres. 20% of the water is used. How many litres are left?

Answer key

  1. 62.5
  2. 5
  3. 2220
  4. 2240
  5. 1510
  6. 40
  7. 6.25
  8. 2336
  9. 1596
  10. 2414
  11. 31.25
  12. 5
  13. 4475
  14. 2400
  15. 1368
  16. 25
  17. 5
  18. 55
  19. 3052
  20. 43
  21. 648
  22. 1344
  23. 75
  24. 26.5
  25. 20.75
  26. 3952
  27. 2898
  28. 4968
  29. 3102
  30. 5060
  31. 10
  32. 50
  33. 2660
  34. 30
  35. 5928
  36. 50
  37. 3990
  38. 1400
  39. 2280
  40. 736

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