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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 971 · 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 3360 litres. 5% of the water is used. How many litres are left?
  2. 2.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  3. 3.A water tank holds 3120 litres. 5% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹4140 to ₹2070. By what percent did it come down?
  5. 5.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  6. 6.A shop sells 3820 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  7. 7.The price of a school bag changes from ₹320 to ₹288. By what percent did it come down?
  8. 8.A price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
  9. 9.The price of a bicycle is ₹2180. It goes up by 50%. What is the new price (in ₹)?
  10. 10.The price of a school bag changes from ₹2640 to ₹3432. By what percent did it go up?
  11. 11.A price goes up by 10% and then goes up by 20% more. By what percent has it gone up in all? =
  12. 12.A price goes up by 50% and then goes up by 40% more. By what percent has it gone up in all? =
  13. 13.A water tank holds 1100 litres. 10% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹1380 to ₹1932. By what percent did it go up?
  15. 15.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  16. 16.The price of a school bag changes from ₹2120 to ₹3180. By what percent did it go up?
  17. 17.The price of a school bag changes from ₹4900 to ₹7350. By what percent did it go up?
  18. 18.The price of a school bag changes from ₹2380 to ₹1785. By what percent did it come down?
  19. 19.The price of a school bag changes from ₹2200 to ₹1980. By what percent did it come down?
  20. 20.A town has 4640 people. Its population grows by 10%. How many people live there now?
  21. 21.The price of a school bag changes from ₹460 to ₹598. By what percent did it go up?
  22. 22.A water tank holds 2440 litres. 10% of the water is used. How many litres are left?
  23. 23.A town has 2500 people. Its population grows by 30%. How many people live there now?
  24. 24.A water tank holds 3180 litres. 20% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹820 to ₹697. By what percent did it come down?
  26. 26.A water tank holds 1020 litres. 15% of the water is used. How many litres are left?
  27. 27.The price of a school bag changes from ₹3600 to ₹3420. By what percent did it come down?
  28. 28.The price of a bicycle is ₹4600. It goes up by 10%. What is the new price (in ₹)?
  29. 29.A water tank holds 840 litres. 10% of the water is used. How many litres are left?
  30. 30.A water tank holds 3780 litres. 40% of the water is used. How many litres are left?
  31. 31.A water tank holds 620 litres. 5% of the water is used. How many litres are left?
  32. 32.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  33. 33.The price of a school bag changes from ₹3100 to ₹2325. By what percent did it come down?
  34. 34.A water tank holds 3500 litres. 20% of the water is used. How many litres are left?
  35. 35.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  36. 36.A water tank holds 3820 litres. 50% of the water is used. How many litres are left?
  37. 37.A shop sells 4600 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  38. 38.The price of a school bag changes from ₹4600 to ₹2300. By what percent did it come down?
  39. 39.A shop sells 440 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  40. 40.The price of a school bag changes from ₹1660 to ₹1826. By what percent did it go up?

Answer key

  1. 3192
  2. 57.5
  3. 2964
  4. 50
  5. 82
  6. 4393
  7. 10
  8. 23.5
  9. 3270
  10. 30
  11. 32
  12. 110
  13. 990
  14. 40
  15. 4
  16. 50
  17. 50
  18. 25
  19. 10
  20. 5104
  21. 30
  22. 2196
  23. 3250
  24. 2544
  25. 15
  26. 867
  27. 5
  28. 5060
  29. 756
  30. 2268
  31. 589
  32. 36.5
  33. 25
  34. 2800
  35. 18.75
  36. 1910
  37. 5750
  38. 50
  39. 660
  40. 10

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