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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 877 · 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 1820 litres. 50% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹3760 to ₹4888. By what percent did it go up?
  3. 3.A water tank holds 2460 litres. 10% of the water is used. How many litres are left?
  4. 4.A shop sells 4520 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  5. 5.The price of a bicycle is ₹1280. It goes up by 40%. What is the new price (in ₹)?
  6. 6.The price of a school bag changes from ₹2660 to ₹3990. By what percent did it go up?
  7. 7.A price comes down by 25% and then comes down by 40% more. By what percent has it come down in all? =
  8. 8.A water tank holds 60 litres. 5% of the water is used. How many litres are left?
  9. 9.A water tank holds 4100 litres. 50% of the water is used. How many litres are left?
  10. 10.A water tank holds 940 litres. 20% of the water is used. How many litres are left?
  11. 11.A shop sells 580 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  12. 12.A water tank holds 4480 litres. 20% of the water is used. How many litres are left?
  13. 13.A shop sells 1320 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  14. 14.A shop sells 1280 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  15. 15.A water tank holds 1680 litres. 20% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹2520 to ₹3276. By what percent did it go up?
  17. 17.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =
  18. 18.A price goes up by 40% and then comes down by 25%. By what percent has it gone up in all? =
  19. 19.The price of a bicycle is ₹4380. It goes up by 10%. What is the new price (in ₹)?
  20. 20.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  21. 21.The price of a bicycle is ₹1280. It goes up by 30%. What is the new price (in ₹)?
  22. 22.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  23. 23.A water tank holds 4360 litres. 40% of the water is used. How many litres are left?
  24. 24.The price of a bicycle is ₹3760. It goes up by 10%. What is the new price (in ₹)?
  25. 25.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  26. 26.A town has 2660 people. Its population grows by 10%. How many people live there now?
  27. 27.A water tank holds 1800 litres. 20% of the water is used. How many litres are left?
  28. 28.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  29. 29.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  30. 30.The price of a school bag changes from ₹1920 to ₹2016. By what percent did it go up?
  31. 31.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  32. 32.A shop sells 300 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  33. 33.A water tank holds 4720 litres. 25% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹4440 to ₹6216. By what percent did it go up?
  35. 35.A water tank holds 3780 litres. 10% of the water is used. How many litres are left?
  36. 36.A water tank holds 3680 litres. 50% of the water is used. How many litres are left?
  37. 37.A water tank holds 2000 litres. 50% of the water is used. How many litres are left?
  38. 38.A water tank holds 4040 litres. 15% of the water is used. How many litres are left?
  39. 39.A water tank holds 1040 litres. 25% of the water is used. How many litres are left?
  40. 40.A water tank holds 4640 litres. 15% of the water is used. How many litres are left?

Answer key

  1. 910
  2. 30
  3. 2214
  4. 4746
  5. 1792
  6. 50
  7. 55
  8. 57
  9. 2050
  10. 752
  11. 609
  12. 3584
  13. 1848
  14. 1792
  15. 1344
  16. 30
  17. 55
  18. 5
  19. 4818
  20. 37.5
  21. 1664
  22. 37.5
  23. 2616
  24. 4136
  25. 65
  26. 2926
  27. 1440
  28. 8
  29. 54
  30. 5
  31. 55
  32. 375
  33. 3540
  34. 40
  35. 3402
  36. 1840
  37. 1000
  38. 3434
  39. 780
  40. 3944

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