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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 955 · 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 460 litres. 5% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹3140 to ₹3297. By what percent did it go up?
  3. 3.A water tank holds 1860 litres. 40% of the water is used. How many litres are left?
  4. 4.A town has 920 people. Its population grows by 40%. How many people live there now?
  5. 5.A water tank holds 440 litres. 50% of the water is used. How many litres are left?
  6. 6.A water tank holds 480 litres. 30% of the water is used. How many litres are left?
  7. 7.The price of a school bag changes from ₹3940 to ₹3152. By what percent did it come down?
  8. 8.The price of a bicycle is ₹4240. It goes up by 25%. What is the new price (in ₹)?
  9. 9.The price of a school bag changes from ₹80 to ₹120. By what percent did it go up?
  10. 10.The price of a school bag changes from ₹420 to ₹630. By what percent did it go up?
  11. 11.A price comes down by 5% and then comes down by 30% more. By what percent has it come down in all? =
  12. 12.A shop sells 4400 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  13. 13.A water tank holds 3700 litres. 10% of the water is used. How many litres are left?
  14. 14.A water tank holds 3480 litres. 10% of the water is used. How many litres are left?
  15. 15.A water tank holds 3740 litres. 10% of the water is used. How many litres are left?
  16. 16.The price of a bicycle is ₹2000. It goes up by 5%. What is the new price (in ₹)?
  17. 17.A water tank holds 3920 litres. 10% of the water is used. How many litres are left?
  18. 18.A water tank holds 1320 litres. 30% of the water is used. How many litres are left?
  19. 19.A price goes up by 25% and then comes down by 10%. By what percent has it gone up in all? =
  20. 20.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  21. 21.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  22. 22.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
  23. 23.The price of a bicycle is ₹4940. It goes up by 50%. What is the new price (in ₹)?
  24. 24.A water tank holds 2780 litres. 40% of the water is used. How many litres are left?
  25. 25.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  26. 26.A water tank holds 2520 litres. 30% of the water is used. How many litres are left?
  27. 27.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  28. 28.The price of a school bag changes from ₹4360 to ₹5450. By what percent did it go up?
  29. 29.A water tank holds 2860 litres. 5% of the water is used. How many litres are left?
  30. 30.A town has 1320 people. Its population grows by 20%. How many people live there now?
  31. 31.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  32. 32.The price of a school bag changes from ₹1240 to ₹1116. By what percent did it come down?
  33. 33.The price of a school bag changes from ₹840 to ₹1092. By what percent did it go up?
  34. 34.The price of a school bag changes from ₹520 to ₹468. By what percent did it come down?
  35. 35.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  36. 36.A town has 300 people. Its population grows by 5%. How many people live there now?
  37. 37.A price goes up by 30% and then goes up by 15% more. By what percent has it gone up in all? =
  38. 38.The price of a bicycle is ₹2840. It goes up by 30%. What is the new price (in ₹)?
  39. 39.A shop sells 2520 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  40. 40.A water tank holds 5000 litres. 15% of the water is used. How many litres are left?

Answer key

  1. 437
  2. 5
  3. 1116
  4. 1288
  5. 220
  6. 336
  7. 20
  8. 5300
  9. 50
  10. 50
  11. 33.5
  12. 6600
  13. 3330
  14. 3132
  15. 3366
  16. 2100
  17. 3528
  18. 924
  19. 12.5
  20. 36.25
  21. 18.75
  22. 23.5
  23. 7410
  24. 1668
  25. 43.75
  26. 1764
  27. 37.5
  28. 25
  29. 2717
  30. 1584
  31. 15.5
  32. 10
  33. 30
  34. 10
  35. 82
  36. 315
  37. 49.5
  38. 3692
  39. 2646
  40. 4250

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