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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 493 · 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 shop sells 4020 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  2. 2.The price of a school bag changes from ₹500 to ₹525. By what percent did it go up?
  3. 3.A water tank holds 3580 litres. 25% of the water is used. How many litres are left?
  4. 4.A water tank holds 580 litres. 40% of the water is used. How many litres are left?
  5. 5.A water tank holds 3900 litres. 50% of the water is used. How many litres are left?
  6. 6.The price of a bicycle is ₹260. It goes up by 15%. What is the new price (in ₹)?
  7. 7.A town has 3100 people. Its population grows by 25%. How many people live there now?
  8. 8.A price comes down by 40% and then comes down by 50% more. By what percent has it come down in all? =
  9. 9.The price of a school bag changes from ₹4400 to ₹4840. By what percent did it go up?
  10. 10.The price of a school bag changes from ₹1960 to ₹2744. By what percent did it go up?
  11. 11.The price of a bicycle is ₹3580. It goes up by 15%. What is the new price (in ₹)?
  12. 12.A water tank holds 840 litres. 50% of the water is used. How many litres are left?
  13. 13.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  14. 14.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
  15. 15.A water tank holds 3560 litres. 15% of the water is used. How many litres are left?
  16. 16.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  17. 17.The price of a bicycle is ₹140. It goes up by 20%. What is the new price (in ₹)?
  18. 18.The price of a bicycle is ₹4560. It goes up by 5%. What is the new price (in ₹)?
  19. 19.The price of a school bag changes from ₹1400 to ₹1540. By what percent did it go up?
  20. 20.A shop sells 2320 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  21. 21.A town has 1320 people. Its population grows by 40%. How many people live there now?
  22. 22.The price of a bicycle is ₹560. It goes up by 20%. What is the new price (in ₹)?
  23. 23.A water tank holds 2800 litres. 15% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹1240 to ₹1364. By what percent did it go up?
  25. 25.The price of a school bag changes from ₹2460 to ₹2583. By what percent did it go up?
  26. 26.A shop sells 540 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  27. 27.The price of a school bag changes from ₹2200 to ₹1760. By what percent did it come down?
  28. 28.The price of a school bag changes from ₹800 to ₹760. By what percent did it come down?
  29. 29.The price of a school bag changes from ₹3660 to ₹4575. By what percent did it go up?
  30. 30.The price of a school bag changes from ₹1380 to ₹1725. By what percent did it go up?
  31. 31.A price goes up by 50% and then comes down by 30%. By what percent has it gone up in all? =
  32. 32.A price comes down by 10% and then comes down by 25% more. By what percent has it come down in all? =
  33. 33.A price goes up by 20% and then comes down by 15%. By what percent has it gone up in all? =
  34. 34.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  35. 35.A shop sells 4900 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  36. 36.A water tank holds 3880 litres. 50% of the water is used. How many litres are left?
  37. 37.The price of a bicycle is ₹4540. It goes up by 30%. What is the new price (in ₹)?
  38. 38.A town has 940 people. Its population grows by 10%. How many people live there now?
  39. 39.The price of a bicycle is ₹4980. It goes up by 30%. What is the new price (in ₹)?
  40. 40.A water tank holds 1120 litres. 40% of the water is used. How many litres are left?

Answer key

  1. 6030
  2. 5
  3. 2685
  4. 348
  5. 1950
  6. 299
  7. 3875
  8. 70
  9. 10
  10. 40
  11. 4117
  12. 420
  13. 15.5
  14. 47
  15. 3026
  16. 72.5
  17. 168
  18. 4788
  19. 10
  20. 2668
  21. 1848
  22. 672
  23. 2380
  24. 10
  25. 5
  26. 648
  27. 20
  28. 5
  29. 25
  30. 25
  31. 5
  32. 32.5
  33. 2
  34. 31.25
  35. 5635
  36. 1940
  37. 5902
  38. 1034
  39. 6474
  40. 672

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