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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 530 · 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 2800 litres. 50% of the water is used. How many litres are left?
  2. 2.A shop sells 2060 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  3. 3.The price of a bicycle is ₹3660. It goes up by 25%. What is the new price (in ₹)?
  4. 4.The price of a school bag changes from ₹2320 to ₹2784. By what percent did it go up?
  5. 5.A water tank holds 2740 litres. 15% of the water is used. How many litres are left?
  6. 6.A water tank holds 4080 litres. 30% of the water is used. How many litres are left?
  7. 7.The price of a school bag changes from ₹260 to ₹130. By what percent did it come down?
  8. 8.A water tank holds 2140 litres. 30% of the water is used. How many litres are left?
  9. 9.A water tank holds 740 litres. 10% of the water is used. How many litres are left?
  10. 10.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  11. 11.A water tank holds 4620 litres. 25% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹4060 to ₹6090. By what percent did it go up?
  13. 13.A shop sells 840 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  14. 14.The price of a school bag changes from ₹1460 to ₹730. By what percent did it come down?
  15. 15.A town has 4100 people. Its population grows by 30%. How many people live there now?
  16. 16.The price of a school bag changes from ₹3780 to ₹4536. By what percent did it go up?
  17. 17.A price comes down by 30% and then comes down by 20% more. By what percent has it come down in all? =
  18. 18.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  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 50% and then goes up by 15% more. By what percent has it gone up in all? =
  21. 21.A price comes down by 40% and then comes down by 10% more. By what percent has it come down in all? =
  22. 22.The price of a school bag changes from ₹860 to ₹903. By what percent did it go up?
  23. 23.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  24. 24.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  25. 25.A water tank holds 1160 litres. 10% of the water is used. How many litres are left?
  26. 26.A price comes down by 40% and then comes down by 40% more. By what percent has it come down in all? =
  27. 27.The price of a bicycle is ₹3020. It goes up by 50%. What is the new price (in ₹)?
  28. 28.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  29. 29.A water tank holds 3680 litres. 25% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹1540 to ₹1155. By what percent did it come down?
  31. 31.A price goes up by 25% and then goes up by 20% more. By what percent has it gone up in all? =
  32. 32.A price comes down by 40% and then comes down by 15% more. By what percent has it come down in all? =
  33. 33.A shop sells 1520 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  34. 34.A shop sells 3280 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  35. 35.A water tank holds 460 litres. 20% of the water is used. How many litres are left?
  36. 36.A price comes down by 40% and then comes down by 20% more. By what percent has it come down in all? =
  37. 37.The price of a school bag changes from ₹2220 to ₹2553. By what percent did it go up?
  38. 38.A shop sells 200 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  39. 39.A price comes down by 50% and then comes down by 30% more. By what percent has it come down in all? =
  40. 40.The price of a school bag changes from ₹3300 to ₹4950. By what percent did it go up?

Answer key

  1. 1400
  2. 2163
  3. 4575
  4. 20
  5. 2329
  6. 2856
  7. 50
  8. 1498
  9. 666
  10. 20.75
  11. 3465
  12. 50
  13. 1176
  14. 50
  15. 5330
  16. 20
  17. 44
  18. 36.25
  19. 26
  20. 72.5
  21. 46
  22. 5
  23. 61
  24. 32.25
  25. 1044
  26. 64
  27. 4530
  28. 43
  29. 2760
  30. 25
  31. 50
  32. 49
  33. 1672
  34. 4100
  35. 368
  36. 52
  37. 15
  38. 220
  39. 65
  40. 50

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