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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 173 · 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 1240 litres. 40% of the water is used. How many litres are left?
  2. 2.A price goes up by 25% and then goes up by 25% more. By what percent has it gone up in all? =
  3. 3.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  4. 4.A price comes down by 20% and then comes down by 30% more. By what percent has it come down in all? =
  5. 5.A town has 3700 people. Its population grows by 15%. How many people live there now?
  6. 6.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  7. 7.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  8. 8.A water tank holds 2060 litres. 10% of the water is used. How many litres are left?
  9. 9.The price of a bicycle is ₹4720. It goes up by 40%. What is the new price (in ₹)?
  10. 10.A shop sells 860 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  11. 11.The price of a school bag changes from ₹2460 to ₹3075. By what percent did it go up?
  12. 12.A price goes up by 20% and then goes up by 50% more. By what percent has it gone up in all? =
  13. 13.A shop sells 3740 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  14. 14.The price of a school bag changes from ₹1520 to ₹2280. By what percent did it go up?
  15. 15.The price of a school bag changes from ₹1100 to ₹1540. By what percent did it go up?
  16. 16.A water tank holds 4400 litres. 40% of the water is used. How many litres are left?
  17. 17.A water tank holds 760 litres. 25% of the water is used. How many litres are left?
  18. 18.The price of a school bag changes from ₹2980 to ₹3725. By what percent did it go up?
  19. 19.The price of a school bag changes from ₹860 to ₹1290. By what percent did it go up?
  20. 20.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  21. 21.A water tank holds 4500 litres. 25% of the water is used. How many litres are left?
  22. 22.A price comes down by 50% and then comes down by 20% more. By what percent has it come down in all? =
  23. 23.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  24. 24.A town has 1420 people. Its population grows by 30%. How many people live there now?
  25. 25.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  26. 26.The price of a bicycle is ₹2960. It goes up by 15%. What is the new price (in ₹)?
  27. 27.A price comes down by 15% and then comes down by 5% more. By what percent has it come down in all? =
  28. 28.A price goes up by 30% and then goes up by 30% more. By what percent has it gone up in all? =
  29. 29.A shop sells 4000 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  30. 30.The price of a school bag changes from ₹500 to ₹600. By what percent did it go up?
  31. 31.The price of a school bag changes from ₹1480 to ₹1628. By what percent did it go up?
  32. 32.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  33. 33.The price of a school bag changes from ₹3660 to ₹4026. By what percent did it go up?
  34. 34.A water tank holds 2320 litres. 15% of the water is used. How many litres are left?
  35. 35.A price comes down by 25% and then comes down by 40% more. By what percent has it come down in all? =
  36. 36.A shop sells 1020 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  37. 37.The price of a school bag changes from ₹2860 to ₹2002. By what percent did it come down?
  38. 38.A price comes down by 20% and then comes down by 25% more. By what percent has it come down in all? =
  39. 39.The price of a school bag changes from ₹1360 to ₹1224. By what percent did it come down?
  40. 40.A water tank holds 380 litres. 25% of the water is used. How many litres are left?

Answer key

  1. 744
  2. 56.25
  3. 20.75
  4. 44
  5. 4255
  6. 54
  7. 26
  8. 1854
  9. 6608
  10. 1290
  11. 25
  12. 80
  13. 3927
  14. 50
  15. 40
  16. 2640
  17. 570
  18. 25
  19. 50
  20. 19.25
  21. 3375
  22. 60
  23. 62.5
  24. 1846
  25. 95
  26. 3404
  27. 19.25
  28. 69
  29. 4200
  30. 20
  31. 10
  32. 57.5
  33. 10
  34. 1972
  35. 55
  36. 1071
  37. 30
  38. 40
  39. 10
  40. 285

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