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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 169 · 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 3420 litres. 25% of the water is used. How many litres are left?
  2. 2.A water tank holds 2280 litres. 30% of the water is used. How many litres are left?
  3. 3.A water tank holds 1720 litres. 50% of the water is used. How many litres are left?
  4. 4.A water tank holds 560 litres. 50% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹3660 to ₹3294. By what percent did it come down?
  6. 6.A water tank holds 2000 litres. 15% of the water is used. How many litres are left?
  7. 7.The price of a bicycle is ₹1300. It goes up by 40%. What is the new price (in ₹)?
  8. 8.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  9. 9.A price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
  10. 10.A price comes down by 5% and then comes down by 40% more. By what percent has it come down in all? =
  11. 11.The price of a school bag changes from ₹1000 to ₹1150. By what percent did it go up?
  12. 12.A water tank holds 4600 litres. 10% of the water is used. How many litres are left?
  13. 13.A water tank holds 3800 litres. 20% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹3380 to ₹3549. By what percent did it go up?
  15. 15.The price of a school bag changes from ₹2160 to ₹1836. By what percent did it come down?
  16. 16.A water tank holds 2020 litres. 25% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹2780 to ₹3197. By what percent did it go up?
  18. 18.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
  19. 19.The price of a school bag changes from ₹460 to ₹690. By what percent did it go up?
  20. 20.A water tank holds 2280 litres. 50% of the water is used. How many litres are left?
  21. 21.The price of a bicycle is ₹4040. It goes up by 20%. What is the new price (in ₹)?
  22. 22.A shop sells 3540 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  23. 23.A water tank holds 3840 litres. 15% of the water is used. How many litres are left?
  24. 24.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
  25. 25.The price of a bicycle is ₹760. It goes up by 50%. What is the new price (in ₹)?
  26. 26.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  27. 27.A water tank holds 320 litres. 5% of the water is used. How many litres are left?
  28. 28.A water tank holds 4340 litres. 40% of the water is used. How many litres are left?
  29. 29.A shop sells 2980 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  30. 30.The price of a school bag changes from ₹240 to ₹144. By what percent did it come down?
  31. 31.A water tank holds 5000 litres. 50% of the water is used. How many litres are left?
  32. 32.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  33. 33.A water tank holds 3640 litres. 40% of the water is used. How many litres are left?
  34. 34.A water tank holds 3380 litres. 25% of the water is used. How many litres are left?
  35. 35.The price of a bicycle is ₹2860. It goes up by 15%. What is the new price (in ₹)?
  36. 36.A water tank holds 4540 litres. 30% of the water is used. How many litres are left?
  37. 37.The price of a bicycle is ₹560. It goes up by 40%. What is the new price (in ₹)?
  38. 38.The price of a school bag changes from ₹1840 to ₹2208. By what percent did it go up?
  39. 39.The price of a bicycle is ₹2740. It goes up by 40%. What is the new price (in ₹)?
  40. 40.A shop sells 2120 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?

Answer key

  1. 2565
  2. 1596
  3. 860
  4. 280
  5. 10
  6. 1700
  7. 1820
  8. 37.5
  9. 23.5
  10. 43
  11. 15
  12. 4140
  13. 3040
  14. 5
  15. 15
  16. 1515
  17. 15
  18. 14
  19. 50
  20. 1140
  21. 4848
  22. 4248
  23. 3264
  24. 24
  25. 1140
  26. 36.25
  27. 304
  28. 2604
  29. 3278
  30. 40
  31. 2500
  32. 9.75
  33. 2184
  34. 2535
  35. 3289
  36. 3178
  37. 784
  38. 20
  39. 3836
  40. 2650

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