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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 352 · 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 comes down by 20%. By what percent has it gone up in all? =
  2. 2.A shop sells 4760 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  3. 3.A water tank holds 860 litres. 25% of the water is used. How many litres are left?
  4. 4.A water tank holds 4520 litres. 15% of the water is used. How many litres are left?
  5. 5.A water tank holds 4480 litres. 20% of the water is used. How many litres are left?
  6. 6.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  7. 7.The price of a school bag changes from ₹4060 to ₹3045. By what percent did it come down?
  8. 8.A price goes up by 25% and then goes up by 25% more. By what percent has it gone up in all? =
  9. 9.The price of a bicycle is ₹1740. It goes up by 15%. What is the new price (in ₹)?
  10. 10.A shop sells 4640 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  11. 11.A shop sells 840 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  12. 12.The price of a bicycle is ₹4820. It goes up by 5%. What is the new price (in ₹)?
  13. 13.A town has 2840 people. Its population grows by 20%. How many people live there now?
  14. 14.A water tank holds 4200 litres. 5% of the water is used. How many litres are left?
  15. 15.A price goes up by 10% and then goes up by 40% more. By what percent has it gone up in all? =
  16. 16.The price of a school bag changes from ₹360 to ₹270. By what percent did it come down?
  17. 17.A water tank holds 5000 litres. 25% of the water is used. How many litres are left?
  18. 18.The price of a bicycle is ₹3020. It goes up by 25%. What is the new price (in ₹)?
  19. 19.A water tank holds 1000 litres. 20% of the water is used. How many litres are left?
  20. 20.A water tank holds 300 litres. 25% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹300 to ₹360. By what percent did it go up?
  22. 22.The price of a school bag changes from ₹4660 to ₹3961. By what percent did it come down?
  23. 23.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  24. 24.The price of a school bag changes from ₹2740 to ₹2877. By what percent did it go up?
  25. 25.A price comes down by 50% and then comes down by 20% more. By what percent has it come down in all? =
  26. 26.A town has 2940 people. Its population grows by 15%. How many people live there now?
  27. 27.The price of a school bag changes from ₹4520 to ₹5876. By what percent did it go up?
  28. 28.A price goes up by 25% and then comes down by 15%. By what percent has it gone up in all? =
  29. 29.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  30. 30.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  31. 31.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  32. 32.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
  33. 33.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  34. 34.The price of a school bag changes from ₹480 to ₹432. By what percent did it come down?
  35. 35.The price of a school bag changes from ₹80 to ₹64. By what percent did it come down?
  36. 36.The price of a school bag changes from ₹3700 to ₹5550. By what percent did it go up?
  37. 37.A water tank holds 4520 litres. 30% of the water is used. How many litres are left?
  38. 38.The price of a bicycle is ₹3480. It goes up by 25%. What is the new price (in ₹)?
  39. 39.The price of a school bag changes from ₹2260 to ₹2034. By what percent did it come down?
  40. 40.A price comes down by 20% and then comes down by 25% more. By what percent has it come down in all? =

Answer key

  1. 4
  2. 4998
  3. 645
  4. 3842
  5. 3584
  6. 21
  7. 25
  8. 56.25
  9. 2001
  10. 5800
  11. 882
  12. 5061
  13. 3408
  14. 3990
  15. 54
  16. 25
  17. 3750
  18. 3775
  19. 800
  20. 225
  21. 20
  22. 15
  23. 38
  24. 5
  25. 60
  26. 3381
  27. 30
  28. 6.25
  29. 75
  30. 37.5
  31. 87.5
  32. 47
  33. 18.75
  34. 10
  35. 20
  36. 50
  37. 3164
  38. 4350
  39. 10
  40. 40

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