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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 949 · 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 town has 340 people. Its population grows by 30%. How many people live there now?
  2. 2.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  3. 3.A price goes up by 5% and then goes up by 50% more. By what percent has it gone up in all? =
  4. 4.A water tank holds 4240 litres. 50% of the water is used. How many litres are left?
  5. 5.A town has 1960 people. Its population grows by 30%. How many people live there now?
  6. 6.The price of a school bag changes from ₹2880 to ₹2016. By what percent did it come down?
  7. 7.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  8. 8.A town has 860 people. Its population grows by 30%. How many people live there now?
  9. 9.A water tank holds 2880 litres. 15% of the water is used. How many litres are left?
  10. 10.A water tank holds 100 litres. 25% of the water is used. How many litres are left?
  11. 11.The price of a bicycle is ₹900. It goes up by 15%. What is the new price (in ₹)?
  12. 12.A water tank holds 4440 litres. 30% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹520 to ₹598. By what percent did it go up?
  14. 14.A water tank holds 120 litres. 5% of the water is used. How many litres are left?
  15. 15.A water tank holds 760 litres. 5% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹2160 to ₹2376. By what percent did it go up?
  17. 17.A water tank holds 2240 litres. 20% of the water is used. How many litres are left?
  18. 18.A shop sells 1880 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  19. 19.A price goes up by 20% and then comes down by 15%. By what percent has it gone up in all? =
  20. 20.A water tank holds 4860 litres. 25% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹2360 to ₹2006. By what percent did it come down?
  22. 22.A water tank holds 1820 litres. 5% of the water is used. How many litres are left?
  23. 23.The price of a bicycle is ₹2260. It goes up by 40%. What is the new price (in ₹)?
  24. 24.A water tank holds 3660 litres. 5% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹4760 to ₹7140. By what percent did it go up?
  26. 26.A water tank holds 1080 litres. 15% of the water is used. How many litres are left?
  27. 27.The price of a bicycle is ₹620. It goes up by 5%. What is the new price (in ₹)?
  28. 28.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  29. 29.The price of a school bag changes from ₹3320 to ₹2822. By what percent did it come down?
  30. 30.The price of a school bag changes from ₹1560 to ₹2340. By what percent did it go up?
  31. 31.A town has 580 people. Its population grows by 15%. How many people live there now?
  32. 32.The price of a school bag changes from ₹3400 to ₹3570. By what percent did it go up?
  33. 33.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  34. 34.The price of a bicycle is ₹2960. It goes up by 10%. What is the new price (in ₹)?
  35. 35.A town has 4240 people. Its population grows by 5%. How many people live there now?
  36. 36.The price of a bicycle is ₹2740. It goes up by 50%. What is the new price (in ₹)?
  37. 37.A water tank holds 1360 litres. 10% of the water is used. How many litres are left?
  38. 38.The price of a school bag changes from ₹720 to ₹504. By what percent did it come down?
  39. 39.The price of a school bag changes from ₹700 to ₹770. By what percent did it go up?
  40. 40.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =

Answer key

  1. 442
  2. 61
  3. 57.5
  4. 2120
  5. 2548
  6. 30
  7. 26.5
  8. 1118
  9. 2448
  10. 75
  11. 1035
  12. 3108
  13. 15
  14. 114
  15. 722
  16. 10
  17. 1792
  18. 2068
  19. 2
  20. 3645
  21. 15
  22. 1729
  23. 3164
  24. 3477
  25. 50
  26. 918
  27. 651
  28. 26.5
  29. 15
  30. 50
  31. 667
  32. 5
  33. 57.5
  34. 3256
  35. 4452
  36. 4110
  37. 1224
  38. 30
  39. 10
  40. 9.25

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