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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 430 · 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 4620 litres. 10% of the water is used. How many litres are left?
  2. 2.A shop sells 3560 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  3. 3.The price of a school bag changes from ₹800 to ₹880. By what percent did it go up?
  4. 4.A water tank holds 4320 litres. 20% of the water is used. How many litres are left?
  5. 5.The price of a bicycle is ₹3280. It goes up by 5%. What is the new price (in ₹)?
  6. 6.A price comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =
  7. 7.A water tank holds 3740 litres. 50% of the water is used. How many litres are left?
  8. 8.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  9. 9.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  10. 10.The price of a bicycle is ₹4940. It goes up by 30%. What is the new price (in ₹)?
  11. 11.The price of a school bag changes from ₹2240 to ₹2800. By what percent did it go up?
  12. 12.A shop sells 2360 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  13. 13.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  14. 14.The price of a school bag changes from ₹3380 to ₹4056. By what percent did it go up?
  15. 15.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  16. 16.A price comes down by 15% and then comes down by 5% more. By what percent has it come down in all? =
  17. 17.A price comes down by 30% and then comes down by 50% more. By what percent has it come down in all? =
  18. 18.The price of a school bag changes from ₹2480 to ₹1984. By what percent did it come down?
  19. 19.The price of a school bag changes from ₹1480 to ₹1406. By what percent did it come down?
  20. 20.The price of a school bag changes from ₹1620 to ₹1863. By what percent did it go up?
  21. 21.A town has 1600 people. Its population grows by 50%. How many people live there now?
  22. 22.A water tank holds 500 litres. 30% of the water is used. How many litres are left?
  23. 23.The price of a bicycle is ₹1300. It goes up by 5%. What is the new price (in ₹)?
  24. 24.The price of a bicycle is ₹100. It goes up by 15%. What is the new price (in ₹)?
  25. 25.A water tank holds 600 litres. 20% of the water is used. How many litres are left?
  26. 26.The price of a bicycle is ₹1280. It goes up by 15%. What is the new price (in ₹)?
  27. 27.The price of a school bag changes from ₹820 to ₹615. By what percent did it come down?
  28. 28.A shop sells 2560 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  29. 29.The price of a school bag changes from ₹1720 to ₹1376. By what percent did it come down?
  30. 30.A water tank holds 1720 litres. 25% of the water is used. How many litres are left?
  31. 31.A shop sells 3600 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  32. 32.A shop sells 2560 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  33. 33.A town has 3360 people. Its population grows by 5%. How many people live there now?
  34. 34.A water tank holds 80 litres. 20% of the water is used. How many litres are left?
  35. 35.A town has 2940 people. Its population grows by 10%. How many people live there now?
  36. 36.A water tank holds 3480 litres. 25% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹4780 to ₹2868. By what percent did it come down?
  38. 38.A shop sells 600 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  39. 39.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  40. 40.A price goes up by 50% and then comes down by 30%. By what percent has it gone up in all? =

Answer key

  1. 4158
  2. 4450
  3. 10
  4. 3456
  5. 3444
  6. 51
  7. 1870
  8. 37.5
  9. 87.5
  10. 6422
  11. 25
  12. 3540
  13. 32
  14. 20
  15. 8
  16. 19.25
  17. 65
  18. 20
  19. 5
  20. 15
  21. 2400
  22. 350
  23. 1365
  24. 115
  25. 480
  26. 1472
  27. 25
  28. 3328
  29. 20
  30. 1290
  31. 4500
  32. 2816
  33. 3528
  34. 64
  35. 3234
  36. 2610
  37. 40
  38. 630
  39. 4
  40. 5

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