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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 724 · 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 goes up by 30% more. By what percent has it gone up in all? =
  2. 2.The price of a school bag changes from ₹2560 to ₹3584. By what percent did it go up?
  3. 3.The price of a school bag changes from ₹4700 to ₹3290. By what percent did it come down?
  4. 4.The price of a school bag changes from ₹4940 to ₹4199. By what percent did it come down?
  5. 5.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  6. 6.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  7. 7.The price of a bicycle is ₹800. It goes up by 30%. What is the new price (in ₹)?
  8. 8.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  9. 9.The price of a school bag changes from ₹540 to ₹378. By what percent did it come down?
  10. 10.The price of a school bag changes from ₹1240 to ₹1426. By what percent did it go up?
  11. 11.The price of a school bag changes from ₹1120 to ₹672. By what percent did it come down?
  12. 12.A water tank holds 3260 litres. 5% of the water is used. How many litres are left?
  13. 13.A water tank holds 3760 litres. 10% of the water is used. How many litres are left?
  14. 14.A water tank holds 4700 litres. 50% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹640 to ₹704. By what percent did it go up?
  16. 16.A shop sells 4420 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  17. 17.A price goes up by 25% and then goes up by 40% more. By what percent has it gone up in all? =
  18. 18.A shop sells 600 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  19. 19.The price of a school bag changes from ₹2100 to ₹2205. By what percent did it go up?
  20. 20.The price of a school bag changes from ₹4140 to ₹5796. By what percent did it go up?
  21. 21.A price goes up by 20% and then goes up by 20% more. By what percent has it gone up in all? =
  22. 22.The price of a school bag changes from ₹2900 to ₹2465. By what percent did it come down?
  23. 23.The price of a school bag changes from ₹1860 to ₹1674. By what percent did it come down?
  24. 24.The price of a bicycle is ₹4960. It goes up by 50%. What is the new price (in ₹)?
  25. 25.A price comes down by 50% and then comes down by 25% more. By what percent has it come down in all? =
  26. 26.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  27. 27.A town has 3440 people. Its population grows by 40%. How many people live there now?
  28. 28.A town has 3980 people. Its population grows by 5%. How many people live there now?
  29. 29.A water tank holds 4480 litres. 25% of the water is used. How many litres are left?
  30. 30.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  31. 31.The price of a school bag changes from ₹300 to ₹150. By what percent did it come down?
  32. 32.A town has 240 people. Its population grows by 30%. How many people live there now?
  33. 33.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  34. 34.A water tank holds 3540 litres. 40% of the water is used. How many litres are left?
  35. 35.A town has 340 people. Its population grows by 10%. How many people live there now?
  36. 36.A shop sells 3780 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  37. 37.A water tank holds 1920 litres. 15% of the water is used. How many litres are left?
  38. 38.A water tank holds 2120 litres. 5% of the water is used. How many litres are left?
  39. 39.A shop sells 1500 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  40. 40.A shop sells 3020 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?

Answer key

  1. 69
  2. 40
  3. 30
  4. 15
  5. 55
  6. 36.25
  7. 1040
  8. 26
  9. 30
  10. 15
  11. 40
  12. 3097
  13. 3384
  14. 2350
  15. 10
  16. 4862
  17. 75
  18. 840
  19. 5
  20. 40
  21. 44
  22. 15
  23. 10
  24. 7440
  25. 62.5
  26. 65
  27. 4816
  28. 4179
  29. 3360
  30. 9.75
  31. 50
  32. 312
  33. 62.5
  34. 2124
  35. 374
  36. 5292
  37. 1632
  38. 2014
  39. 1575
  40. 3624

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