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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 402 · 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.The price of a school bag changes from ₹900 to ₹540. By what percent did it come down?
  2. 2.A water tank holds 2040 litres. 50% of the water is used. How many litres are left?
  3. 3.A water tank holds 600 litres. 25% of the water is used. How many litres are left?
  4. 4.A town has 4180 people. Its population grows by 20%. How many people live there now?
  5. 5.A shop sells 180 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  6. 6.A water tank holds 4460 litres. 15% of the water is used. How many litres are left?
  7. 7.The price of a bicycle is ₹780. It goes up by 20%. What is the new price (in ₹)?
  8. 8.The price of a school bag changes from ₹4880 to ₹6100. By what percent did it go up?
  9. 9.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  10. 10.A water tank holds 1600 litres. 50% of the water is used. How many litres are left?
  11. 11.A water tank holds 3680 litres. 30% of the water is used. How many litres are left?
  12. 12.A water tank holds 1920 litres. 10% of the water is used. How many litres are left?
  13. 13.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =
  14. 14.A water tank holds 4780 litres. 50% of the water is used. How many litres are left?
  15. 15.A water tank holds 440 litres. 10% of the water is used. How many litres are left?
  16. 16.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  17. 17.The price of a school bag changes from ₹1060 to ₹742. By what percent did it come down?
  18. 18.A price goes up by 40% and then comes down by 25%. By what percent has it gone up in all? =
  19. 19.A water tank holds 1380 litres. 25% of the water is used. How many litres are left?
  20. 20.A price comes down by 20% and then comes down by 20% more. By what percent has it come down in all? =
  21. 21.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  22. 22.A price goes up by 50% and then comes down by 30%. By what percent has it gone up in all? =
  23. 23.A water tank holds 1900 litres. 5% of the water is used. How many litres are left?
  24. 24.A price comes down by 25% and then comes down by 50% more. By what percent has it come down in all? =
  25. 25.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  26. 26.A water tank holds 3120 litres. 10% of the water is used. How many litres are left?
  27. 27.The price of a school bag changes from ₹680 to ₹850. By what percent did it go up?
  28. 28.A water tank holds 2140 litres. 15% of the water is used. How many litres are left?
  29. 29.A shop sells 4500 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  30. 30.The price of a school bag changes from ₹1760 to ₹1496. By what percent did it come down?
  31. 31.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  32. 32.The price of a school bag changes from ₹820 to ₹1066. By what percent did it go up?
  33. 33.A shop sells 260 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  34. 34.A water tank holds 3480 litres. 5% of the water is used. How many litres are left?
  35. 35.A shop sells 1140 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  36. 36.A shop sells 580 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  37. 37.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  38. 38.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
  39. 39.A water tank holds 2920 litres. 25% of the water is used. How many litres are left?
  40. 40.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =

Answer key

  1. 40
  2. 1020
  3. 450
  4. 5016
  5. 225
  6. 3791
  7. 936
  8. 25
  9. 65
  10. 800
  11. 2576
  12. 1728
  13. 28
  14. 2390
  15. 396
  16. 9.75
  17. 30
  18. 5
  19. 1035
  20. 36
  21. 80
  22. 5
  23. 1805
  24. 62.5
  25. 55
  26. 2808
  27. 25
  28. 1819
  29. 6300
  30. 15
  31. 75
  32. 30
  33. 338
  34. 3306
  35. 1710
  36. 696
  37. 65
  38. 20
  39. 2190
  40. 32

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