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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 135 · 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 15% and then goes up by 15% more. By what percent has it gone up in all? =
  2. 2.A shop sells 1280 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  3. 3.A town has 1160 people. Its population grows by 5%. How many people live there now?
  4. 4.The price of a bicycle is ₹4180. It goes up by 40%. What is the new price (in ₹)?
  5. 5.A town has 380 people. Its population grows by 15%. How many people live there now?
  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.A water tank holds 4060 litres. 10% of the water is used. How many litres are left?
  8. 8.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  9. 9.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  10. 10.The price of a bicycle is ₹3180. It goes up by 15%. What is the new price (in ₹)?
  11. 11.A water tank holds 4680 litres. 50% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹3500 to ₹4900. By what percent did it go up?
  13. 13.The price of a school bag changes from ₹2540 to ₹3302. By what percent did it go up?
  14. 14.The price of a school bag changes from ₹2340 to ₹3042. By what percent did it go up?
  15. 15.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  16. 16.The price of a school bag changes from ₹2980 to ₹1788. By what percent did it come down?
  17. 17.A shop sells 1320 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  18. 18.The price of a school bag changes from ₹1000 to ₹1250. By what percent did it go up?
  19. 19.The price of a school bag changes from ₹820 to ₹1066. By what percent did it go up?
  20. 20.A water tank holds 4920 litres. 30% of the water is used. How many litres are left?
  21. 21.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
  22. 22.The price of a school bag changes from ₹2560 to ₹2688. By what percent did it go up?
  23. 23.The price of a bicycle is ₹1140. It goes up by 10%. What is the new price (in ₹)?
  24. 24.A shop sells 760 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  25. 25.A water tank holds 620 litres. 50% of the water is used. How many litres are left?
  26. 26.A town has 3880 people. Its population grows by 5%. How many people live there now?
  27. 27.A town has 4840 people. Its population grows by 40%. How many people live there now?
  28. 28.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  29. 29.A town has 4720 people. Its population grows by 30%. How many people live there now?
  30. 30.The price of a school bag changes from ₹4380 to ₹4161. By what percent did it come down?
  31. 31.The price of a school bag changes from ₹920 to ₹1058. By what percent did it go up?
  32. 32.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  33. 33.A town has 660 people. Its population grows by 20%. How many people live there now?
  34. 34.A water tank holds 700 litres. 5% of the water is used. How many litres are left?
  35. 35.A water tank holds 3420 litres. 10% of the water is used. How many litres are left?
  36. 36.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
  37. 37.The price of a bicycle is ₹4920. It goes up by 15%. What is the new price (in ₹)?
  38. 38.A water tank holds 2420 litres. 20% of the water is used. How many litres are left?
  39. 39.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  40. 40.The price of a school bag changes from ₹3380 to ₹2535. By what percent did it come down?

Answer key

  1. 32.25
  2. 1344
  3. 1218
  4. 5852
  5. 437
  6. 36.25
  7. 3654
  8. 50
  9. 26.5
  10. 3657
  11. 2340
  12. 40
  13. 30
  14. 30
  15. 38
  16. 40
  17. 1518
  18. 25
  19. 30
  20. 3444
  21. 20
  22. 5
  23. 1254
  24. 836
  25. 310
  26. 4074
  27. 6776
  28. 75
  29. 6136
  30. 5
  31. 15
  32. 20.75
  33. 792
  34. 665
  35. 3078
  36. 49.5
  37. 5658
  38. 1936
  39. 19.25
  40. 25

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