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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 900 · 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 1580 litres. 10% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹4560 to ₹4332. By what percent did it come down?
  3. 3.A water tank holds 2920 litres. 50% of the water is used. How many litres are left?
  4. 4.The price of a bicycle is ₹740. It goes up by 15%. What is the new price (in ₹)?
  5. 5.The price of a school bag changes from ₹4520 to ₹4068. By what percent did it come down?
  6. 6.The price of a bicycle is ₹300. It goes up by 15%. What is the new price (in ₹)?
  7. 7.The price of a bicycle is ₹1760. It goes up by 20%. What is the new price (in ₹)?
  8. 8.The price of a school bag changes from ₹120 to ₹126. By what percent did it go up?
  9. 9.The price of a school bag changes from ₹560 to ₹644. By what percent did it go up?
  10. 10.A price goes up by 25% and then goes up by 40% more. By what percent has it gone up in all? =
  11. 11.A water tank holds 4220 litres. 10% of the water is used. How many litres are left?
  12. 12.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  13. 13.A water tank holds 4440 litres. 5% of the water is used. How many litres are left?
  14. 14.A water tank holds 380 litres. 5% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹3160 to ₹3476. By what percent did it go up?
  16. 16.The price of a bicycle is ₹840. It goes up by 25%. What is the new price (in ₹)?
  17. 17.The price of a school bag changes from ₹3020 to ₹2416. By what percent did it come down?
  18. 18.A shop sells 1480 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 5% and then goes up by 20% more. By what percent has it gone up in all? =
  20. 20.A price goes up by 30% and then comes down by 15%. By what percent has it gone up in all? =
  21. 21.The price of a school bag changes from ₹2600 to ₹2730. By what percent did it go up?
  22. 22.A water tank holds 2560 litres. 15% of the water is used. How many litres are left?
  23. 23.A water tank holds 820 litres. 50% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹2640 to ₹2904. By what percent did it go up?
  25. 25.A town has 2820 people. Its population grows by 30%. How many people live there now?
  26. 26.The price of a school bag changes from ₹4060 to ₹4872. By what percent did it go up?
  27. 27.A price goes up by 20% and then comes down by 15%. By what percent has it gone up in all? =
  28. 28.The price of a bicycle is ₹720. It goes up by 15%. What is the new price (in ₹)?
  29. 29.The price of a bicycle is ₹2960. It goes up by 30%. What is the new price (in ₹)?
  30. 30.The price of a school bag changes from ₹4420 to ₹5525. By what percent did it go up?
  31. 31.A town has 3820 people. Its population grows by 25%. How many people live there now?
  32. 32.The price of a bicycle is ₹3900. It goes up by 10%. What is the new price (in ₹)?
  33. 33.The price of a bicycle is ₹700. It goes up by 50%. What is the new price (in ₹)?
  34. 34.The price of a school bag changes from ₹2200 to ₹2420. By what percent did it go up?
  35. 35.A shop sells 1380 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  36. 36.A water tank holds 1440 litres. 50% of the water is used. How many litres are left?
  37. 37.A shop sells 2260 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  38. 38.A water tank holds 1960 litres. 10% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹1440 to ₹864. By what percent did it come down?
  40. 40.A town has 1900 people. Its population grows by 20%. How many people live there now?

Answer key

  1. 1422
  2. 5
  3. 1460
  4. 851
  5. 10
  6. 345
  7. 2112
  8. 5
  9. 15
  10. 75
  11. 3798
  12. 82
  13. 4218
  14. 361
  15. 10
  16. 1050
  17. 20
  18. 1628
  19. 26
  20. 10.5
  21. 5
  22. 2176
  23. 410
  24. 10
  25. 3666
  26. 20
  27. 2
  28. 828
  29. 3848
  30. 25
  31. 4775
  32. 4290
  33. 1050
  34. 10
  35. 1449
  36. 720
  37. 2373
  38. 1764
  39. 40
  40. 2280

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