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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 133 · 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.

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  1. 1.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  2. 2.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =
  3. 3.The price of a school bag changes from ₹4240 to ₹5512. By what percent did it go up?
  4. 4.The price of a school bag changes from ₹4060 to ₹2842. By what percent did it come down?
  5. 5.The price of a bicycle is ₹3780. It goes up by 30%. What is the new price (in ₹)?
  6. 6.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
  7. 7.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =
  8. 8.The price of a school bag changes from ₹4500 to ₹3825. By what percent did it come down?
  9. 9.A water tank holds 4740 litres. 5% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹3100 to ₹3410. By what percent did it go up?
  11. 11.The price of a school bag changes from ₹2740 to ₹2329. By what percent did it come down?
  12. 12.The price of a school bag changes from ₹3540 to ₹2124. By what percent did it come down?
  13. 13.A price comes down by 25% and then comes down by 40% more. By what percent has it come down in all? =
  14. 14.A water tank holds 1180 litres. 25% of the water is used. How many litres are left?
  15. 15.The price of a bicycle is ₹4000. It goes up by 50%. What is the new price (in ₹)?
  16. 16.A shop sells 2160 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  17. 17.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  18. 18.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  19. 19.The price of a school bag changes from ₹2940 to ₹2205. By what percent did it come down?
  20. 20.A water tank holds 2520 litres. 40% of the water is used. How many litres are left?
  21. 21.The price of a bicycle is ₹100. It goes up by 25%. What is the new price (in ₹)?
  22. 22.The price of a bicycle is ₹800. It goes up by 10%. What is the new price (in ₹)?
  23. 23.The price of a school bag changes from ₹4200 to ₹3570. By what percent did it come down?
  24. 24.A price goes up by 30% and then comes down by 15%. By what percent has it gone up in all? =
  25. 25.The price of a bicycle is ₹4960. It goes up by 10%. What is the new price (in ₹)?
  26. 26.The price of a bicycle is ₹2480. It goes up by 20%. What is the new price (in ₹)?
  27. 27.A water tank holds 3640 litres. 10% of the water is used. How many litres are left?
  28. 28.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  29. 29.A shop sells 3600 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  30. 30.The price of a bicycle is ₹800. It goes up by 40%. What is the new price (in ₹)?
  31. 31.A water tank holds 2180 litres. 50% of the water is used. How many litres are left?
  32. 32.A water tank holds 4500 litres. 30% of the water is used. How many litres are left?
  33. 33.A town has 2160 people. Its population grows by 15%. How many people live there now?
  34. 34.A water tank holds 1580 litres. 10% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹4100 to ₹5740. By what percent did it go up?
  36. 36.A water tank holds 3160 litres. 5% of the water is used. How many litres are left?
  37. 37.A water tank holds 3680 litres. 40% of the water is used. How many litres are left?
  38. 38.The price of a school bag changes from ₹2180 to ₹2071. By what percent did it come down?
  39. 39.A water tank holds 2140 litres. 10% of the water is used. How many litres are left?
  40. 40.A water tank holds 720 litres. 20% of the water is used. How many litres are left?

Answer key

  1. 50
  2. 87.5
  3. 30
  4. 30
  5. 4914
  6. 24
  7. 43
  8. 15
  9. 4503
  10. 10
  11. 15
  12. 40
  13. 55
  14. 885
  15. 6000
  16. 2700
  17. 61
  18. 23.5
  19. 25
  20. 1512
  21. 125
  22. 880
  23. 15
  24. 10.5
  25. 5456
  26. 2976
  27. 3276
  28. 57.5
  29. 4680
  30. 1120
  31. 1090
  32. 3150
  33. 2484
  34. 1422
  35. 40
  36. 3002
  37. 2208
  38. 5
  39. 1926
  40. 576

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