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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 831 · 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 shop sells 540 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  2. 2.A price comes down by 20% and then comes down by 50% more. By what percent has it come down in all? =
  3. 3.A price comes down by 20% and then comes down by 40% more. By what percent has it come down in all? =
  4. 4.The price of a school bag changes from ₹840 to ₹882. By what percent did it go up?
  5. 5.A town has 2620 people. Its population grows by 15%. How many people live there now?
  6. 6.The price of a school bag changes from ₹2700 to ₹3510. By what percent did it go up?
  7. 7.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  8. 8.The price of a bicycle is ₹3160. It goes up by 30%. What is the new price (in ₹)?
  9. 9.The price of a bicycle is ₹4780. It goes up by 40%. What is the new price (in ₹)?
  10. 10.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  11. 11.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =
  12. 12.A shop sells 580 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  13. 13.A shop sells 4920 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  14. 14.The price of a bicycle is ₹880. It goes up by 50%. What is the new price (in ₹)?
  15. 15.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =
  16. 16.A water tank holds 2680 litres. 15% of the water is used. How many litres are left?
  17. 17.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  18. 18.A water tank holds 3200 litres. 15% of the water is used. How many litres are left?
  19. 19.The price of a school bag changes from ₹620 to ₹775. By what percent did it go up?
  20. 20.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  21. 21.A shop sells 4920 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  22. 22.The price of a school bag changes from ₹80 to ₹100. By what percent did it go up?
  23. 23.The price of a school bag changes from ₹1180 to ₹1298. By what percent did it go up?
  24. 24.The price of a bicycle is ₹3540. It goes up by 10%. What is the new price (in ₹)?
  25. 25.A shop sells 1160 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  26. 26.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  27. 27.A price goes up by 15% and then goes up by 50% more. By what percent has it gone up in all? =
  28. 28.A water tank holds 540 litres. 40% of the water is used. How many litres are left?
  29. 29.The price of a bicycle is ₹260. It goes up by 50%. What is the new price (in ₹)?
  30. 30.A water tank holds 840 litres. 5% of the water is used. How many litres are left?
  31. 31.A town has 2840 people. Its population grows by 15%. How many people live there now?
  32. 32.The price of a school bag changes from ₹4140 to ₹2070. By what percent did it come down?
  33. 33.A shop sells 800 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  34. 34.The price of a school bag changes from ₹1540 to ₹924. By what percent did it come down?
  35. 35.The price of a school bag changes from ₹1500 to ₹1425. By what percent did it come down?
  36. 36.The price of a school bag changes from ₹1060 to ₹1272. By what percent did it go up?
  37. 37.A shop sells 2380 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  38. 38.A town has 3060 people. Its population grows by 30%. How many people live there now?
  39. 39.A shop sells 1920 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  40. 40.A town has 3460 people. Its population grows by 25%. How many people live there now?

Answer key

  1. 648
  2. 60
  3. 52
  4. 5
  5. 3013
  6. 30
  7. 87.5
  8. 4108
  9. 6692
  10. 36.5
  11. 43
  12. 725
  13. 5166
  14. 1320
  15. 70
  16. 2278
  17. 8
  18. 2720
  19. 25
  20. 14.5
  21. 5904
  22. 25
  23. 10
  24. 3894
  25. 1450
  26. 9.75
  27. 72.5
  28. 324
  29. 390
  30. 798
  31. 3266
  32. 50
  33. 1200
  34. 40
  35. 5
  36. 20
  37. 2737
  38. 3978
  39. 2688
  40. 4325

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