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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 781 · 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 4900 litres. 15% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹1160 to ₹1218. By what percent did it go up?
  3. 3.The price of a bicycle is ₹2800. It goes up by 50%. What is the new price (in ₹)?
  4. 4.The price of a school bag changes from ₹2300 to ₹2875. By what percent did it go up?
  5. 5.The price of a bicycle is ₹4420. It goes up by 10%. What is the new price (in ₹)?
  6. 6.A water tank holds 840 litres. 50% of the water is used. How many litres are left?
  7. 7.The price of a school bag changes from ₹620 to ₹744. By what percent did it go up?
  8. 8.The price of a bicycle is ₹4080. It goes up by 10%. What is the new price (in ₹)?
  9. 9.A water tank holds 1020 litres. 30% of the water is used. How many litres are left?
  10. 10.A town has 1920 people. Its population grows by 20%. How many people live there now?
  11. 11.The price of a school bag changes from ₹4840 to ₹6050. By what percent did it go up?
  12. 12.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =
  13. 13.A water tank holds 3020 litres. 5% of the water is used. How many litres are left?
  14. 14.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  15. 15.A town has 400 people. Its population grows by 10%. How many people live there now?
  16. 16.The price of a school bag changes from ₹980 to ₹1372. By what percent did it go up?
  17. 17.A water tank holds 3800 litres. 5% of the water is used. How many litres are left?
  18. 18.The price of a school bag changes from ₹420 to ₹462. By what percent did it go up?
  19. 19.The price of a school bag changes from ₹1140 to ₹1368. By what percent did it go up?
  20. 20.The price of a school bag changes from ₹1280 to ₹1792. By what percent did it go up?
  21. 21.The price of a bicycle is ₹3500. It goes up by 25%. What is the new price (in ₹)?
  22. 22.A water tank holds 760 litres. 25% of the water is used. How many litres are left?
  23. 23.The price of a school bag changes from ₹4700 to ₹3525. By what percent did it come down?
  24. 24.A town has 1500 people. Its population grows by 40%. How many people live there now?
  25. 25.A price goes up by 40% and then goes up by 50% more. By what percent has it gone up in all? =
  26. 26.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  27. 27.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  28. 28.The price of a school bag changes from ₹3280 to ₹4920. By what percent did it go up?
  29. 29.A shop sells 1580 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  30. 30.The price of a school bag changes from ₹2200 to ₹2310. By what percent did it go up?
  31. 31.A water tank holds 880 litres. 10% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹4560 to ₹5016. By what percent did it go up?
  33. 33.A shop sells 1160 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  34. 34.A water tank holds 640 litres. 10% of the water is used. How many litres are left?
  35. 35.A water tank holds 1040 litres. 30% of the water is used. How many litres are left?
  36. 36.A price comes down by 40% and then comes down by 10% more. By what percent has it come down in all? =
  37. 37.The price of a bicycle is ₹1500. It goes up by 40%. What is the new price (in ₹)?
  38. 38.A water tank holds 1180 litres. 20% of the water is used. How many litres are left?
  39. 39.A price goes up by 25% and then comes down by 10%. By what percent has it gone up in all? =
  40. 40.The price of a school bag changes from ₹2940 to ₹3528. By what percent did it go up?

Answer key

  1. 4165
  2. 5
  3. 4200
  4. 25
  5. 4862
  6. 420
  7. 20
  8. 4488
  9. 714
  10. 2304
  11. 25
  12. 55
  13. 2869
  14. 82
  15. 440
  16. 40
  17. 3610
  18. 10
  19. 20
  20. 40
  21. 4375
  22. 570
  23. 25
  24. 2100
  25. 110
  26. 52.5
  27. 9.75
  28. 50
  29. 1659
  30. 5
  31. 792
  32. 10
  33. 1740
  34. 576
  35. 728
  36. 46
  37. 2100
  38. 944
  39. 12.5
  40. 20

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