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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 751 · 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 720 litres. 5% of the water is used. How many litres are left?
  2. 2.A town has 4800 people. Its population grows by 5%. How many people live there now?
  3. 3.A water tank holds 440 litres. 5% of the water is used. How many litres are left?
  4. 4.A water tank holds 3680 litres. 25% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹1120 to ₹784. By what percent did it come down?
  6. 6.A water tank holds 1440 litres. 50% of the water is used. How many litres are left?
  7. 7.A water tank holds 980 litres. 15% of the water is used. How many litres are left?
  8. 8.The price of a bicycle is ₹1860. It goes up by 50%. What is the new price (in ₹)?
  9. 9.The price of a school bag changes from ₹2120 to ₹2226. By what percent did it go up?
  10. 10.A price comes down by 25% and then comes down by 30% more. By what percent has it come down in all? =
  11. 11.A town has 3260 people. Its population grows by 30%. How many people live there now?
  12. 12.A price goes up by 20% and then goes up by 20% more. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹4980 to ₹6474. By what percent did it go up?
  14. 14.The price of a school bag changes from ₹360 to ₹378. By what percent did it go up?
  15. 15.The price of a bicycle is ₹420. It goes up by 50%. What is the new price (in ₹)?
  16. 16.A town has 4980 people. Its population grows by 40%. How many people live there now?
  17. 17.A town has 2680 people. Its population grows by 20%. How many people live there now?
  18. 18.A town has 4900 people. Its population grows by 20%. How many people live there now?
  19. 19.The price of a bicycle is ₹1480. It goes up by 5%. What is the new price (in ₹)?
  20. 20.The price of a school bag changes from ₹700 to ₹665. By what percent did it come down?
  21. 21.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  22. 22.The price of a school bag changes from ₹1300 to ₹1950. By what percent did it go up?
  23. 23.The price of a bicycle is ₹4680. It goes up by 40%. What is the new price (in ₹)?
  24. 24.A water tank holds 4900 litres. 10% of the water is used. How many litres are left?
  25. 25.The price of a bicycle is ₹2520. It goes up by 5%. What is the new price (in ₹)?
  26. 26.The price of a school bag changes from ₹1300 to ₹1820. By what percent did it go up?
  27. 27.A price comes down by 20% and then comes down by 20% more. By what percent has it come down in all? =
  28. 28.A water tank holds 4160 litres. 5% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹2780 to ₹3197. By what percent did it go up?
  30. 30.A town has 1920 people. Its population grows by 15%. How many people live there now?
  31. 31.A water tank holds 4760 litres. 15% of the water is used. How many litres are left?
  32. 32.A water tank holds 4380 litres. 20% of the water is used. How many litres are left?
  33. 33.A price goes up by 50% and then comes down by 30%. By what percent has it gone up in all? =
  34. 34.A water tank holds 1140 litres. 50% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹140 to ₹161. By what percent did it go up?
  36. 36.A water tank holds 1780 litres. 10% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹2420 to ₹2299. By what percent did it come down?
  38. 38.The price of a school bag changes from ₹4080 to ₹4284. By what percent did it go up?
  39. 39.A shop sells 4100 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  40. 40.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =

Answer key

  1. 684
  2. 5040
  3. 418
  4. 2760
  5. 30
  6. 720
  7. 833
  8. 2790
  9. 5
  10. 47.5
  11. 4238
  12. 44
  13. 30
  14. 5
  15. 630
  16. 6972
  17. 3216
  18. 5880
  19. 1554
  20. 5
  21. 26
  22. 50
  23. 6552
  24. 4410
  25. 2646
  26. 40
  27. 36
  28. 3952
  29. 15
  30. 2208
  31. 4046
  32. 3504
  33. 5
  34. 570
  35. 15
  36. 1602
  37. 5
  38. 5
  39. 6150
  40. 15.5

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