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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 811 · 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.The price of a bicycle is ₹3480. It goes up by 15%. What is the new price (in ₹)?
  2. 2.A town has 4940 people. Its population grows by 50%. How many people live there now?
  3. 3.The price of a school bag changes from ₹1000 to ₹700. By what percent did it come down?
  4. 4.A water tank holds 140 litres. 15% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹1340 to ₹1742. By what percent did it go up?
  6. 6.The price of a school bag changes from ₹4500 to ₹5850. By what percent did it go up?
  7. 7.A shop sells 720 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  8. 8.A water tank holds 3720 litres. 25% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹1540 to ₹1078. By what percent did it come down?
  10. 10.A price comes down by 50% and then comes down by 30% more. By what percent has it come down in all? =
  11. 11.The price of a school bag changes from ₹460 to ₹598. By what percent did it go up?
  12. 12.A water tank holds 1280 litres. 15% of the water is used. How many litres are left?
  13. 13.A water tank holds 1420 litres. 25% of the water is used. How many litres are left?
  14. 14.A water tank holds 2020 litres. 40% of the water is used. How many litres are left?
  15. 15.The price of a bicycle is ₹1120. It goes up by 5%. What is the new price (in ₹)?
  16. 16.A water tank holds 140 litres. 5% of the water is used. How many litres are left?
  17. 17.A shop sells 4740 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  18. 18.A town has 1100 people. Its population grows by 10%. How many people live there now?
  19. 19.The price of a bicycle is ₹2080. It goes up by 15%. What is the new price (in ₹)?
  20. 20.A town has 4940 people. Its population grows by 40%. How many people live there now?
  21. 21.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  22. 22.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  23. 23.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  24. 24.The price of a school bag changes from ₹2240 to ₹1120. By what percent did it come down?
  25. 25.A town has 2900 people. Its population grows by 25%. How many people live there now?
  26. 26.The price of a school bag changes from ₹4820 to ₹5302. By what percent did it go up?
  27. 27.A town has 1220 people. Its population grows by 10%. How many people live there now?
  28. 28.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =
  29. 29.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  30. 30.The price of a school bag changes from ₹4040 to ₹5252. By what percent did it go up?
  31. 31.A water tank holds 1260 litres. 50% of the water is used. How many litres are left?
  32. 32.A water tank holds 4840 litres. 5% of the water is used. How many litres are left?
  33. 33.A water tank holds 1120 litres. 30% of the water is used. How many litres are left?
  34. 34.A water tank holds 2980 litres. 20% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹3260 to ₹3749. By what percent did it go up?
  36. 36.The price of a school bag changes from ₹3500 to ₹2975. By what percent did it come down?
  37. 37.A water tank holds 2660 litres. 15% of the water is used. How many litres are left?
  38. 38.A water tank holds 1780 litres. 25% of the water is used. How many litres are left?
  39. 39.A shop sells 4840 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  40. 40.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =

Answer key

  1. 4002
  2. 7410
  3. 30
  4. 119
  5. 30
  6. 30
  7. 936
  8. 2790
  9. 30
  10. 65
  11. 30
  12. 1088
  13. 1065
  14. 1212
  15. 1176
  16. 133
  17. 5925
  18. 1210
  19. 2392
  20. 6916
  21. 26
  22. 26.5
  23. 15.5
  24. 50
  25. 3625
  26. 10
  27. 1342
  28. 70
  29. 9.75
  30. 30
  31. 630
  32. 4598
  33. 784
  34. 2384
  35. 15
  36. 15
  37. 2261
  38. 1335
  39. 6050
  40. 32

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