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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 484 · 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 4180 litres. 40% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹1260 to ₹756. By what percent did it come down?
  3. 3.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  4. 4.A shop sells 2400 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  5. 5.A town has 4440 people. Its population grows by 5%. How many people live there now?
  6. 6.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  7. 7.The price of a school bag changes from ₹3580 to ₹3938. By what percent did it go up?
  8. 8.A shop sells 2460 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  9. 9.A water tank holds 4140 litres. 20% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹80 to ₹104. By what percent did it go up?
  11. 11.A town has 2880 people. Its population grows by 15%. How many people live there now?
  12. 12.A water tank holds 4600 litres. 50% of the water is used. How many litres are left?
  13. 13.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  14. 14.A price goes up by 25% and then comes down by 10%. By what percent has it gone up in all? =
  15. 15.A town has 3220 people. Its population grows by 40%. How many people live there now?
  16. 16.A water tank holds 500 litres. 40% of the water is used. How many litres are left?
  17. 17.A price goes up by 20% and then goes up by 50% more. By what percent has it gone up in all? =
  18. 18.A town has 4880 people. Its population grows by 20%. How many people live there now?
  19. 19.The price of a school bag changes from ₹3680 to ₹4784. By what percent did it go up?
  20. 20.The price of a bicycle is ₹2340. It goes up by 15%. What is the new price (in ₹)?
  21. 21.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  22. 22.A shop sells 3740 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  23. 23.A shop sells 4280 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  24. 24.A water tank holds 660 litres. 25% of the water is used. How many litres are left?
  25. 25.A water tank holds 2320 litres. 20% of the water is used. How many litres are left?
  26. 26.A price comes down by 20% and then comes down by 15% more. By what percent has it come down in all? =
  27. 27.A water tank holds 2040 litres. 30% of the water is used. How many litres are left?
  28. 28.The price of a school bag changes from ₹3160 to ₹4108. By what percent did it go up?
  29. 29.The price of a school bag changes from ₹3880 to ₹3686. By what percent did it come down?
  30. 30.A price goes up by 40% and then comes down by 25%. By what percent has it gone up in all? =
  31. 31.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  32. 32.A water tank holds 2760 litres. 5% of the water is used. How many litres are left?
  33. 33.A water tank holds 1420 litres. 40% of the water is used. How many litres are left?
  34. 34.The price of a bicycle is ₹3380. It goes up by 10%. What is the new price (in ₹)?
  35. 35.A water tank holds 4900 litres. 30% of the water is used. How many litres are left?
  36. 36.A water tank holds 2580 litres. 25% of the water is used. How many litres are left?
  37. 37.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  38. 38.A water tank holds 3520 litres. 40% of the water is used. How many litres are left?
  39. 39.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  40. 40.A water tank holds 1360 litres. 50% of the water is used. How many litres are left?

Answer key

  1. 2508
  2. 40
  3. 26.5
  4. 3000
  5. 4662
  6. 52.5
  7. 10
  8. 3075
  9. 3312
  10. 30
  11. 3312
  12. 2300
  13. 47
  14. 12.5
  15. 4508
  16. 300
  17. 80
  18. 5856
  19. 30
  20. 2691
  21. 38
  22. 4488
  23. 6420
  24. 495
  25. 1856
  26. 32
  27. 1428
  28. 30
  29. 5
  30. 5
  31. 4
  32. 2622
  33. 852
  34. 3718
  35. 3430
  36. 1935
  37. 36.5
  38. 2112
  39. 18.75
  40. 680

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