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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 649 · 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 1780 litres. 30% of the water is used. How many litres are left?
  2. 2.The price of a bicycle is ₹3660. It goes up by 15%. What is the new price (in ₹)?
  3. 3.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
  4. 4.The price of a school bag changes from ₹1480 to ₹2220. By what percent did it go up?
  5. 5.A water tank holds 4500 litres. 5% of the water is used. How many litres are left?
  6. 6.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  7. 7.A water tank holds 960 litres. 40% of the water is used. How many litres are left?
  8. 8.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
  9. 9.A price comes down by 20% and then comes down by 25% more. By what percent has it come down in all? =
  10. 10.A shop sells 1100 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  11. 11.A town has 4980 people. Its population grows by 20%. How many people live there now?
  12. 12.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  13. 13.A water tank holds 1140 litres. 10% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹3680 to ₹5520. By what percent did it go up?
  15. 15.A price comes down by 20% and then comes down by 20% more. By what percent has it come down in all? =
  16. 16.A water tank holds 1340 litres. 40% of the water is used. How many litres are left?
  17. 17.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  18. 18.The price of a school bag changes from ₹2340 to ₹1755. By what percent did it come down?
  19. 19.The price of a school bag changes from ₹580 to ₹435. By what percent did it come down?
  20. 20.A shop sells 920 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  21. 21.A price comes down by 20% and then comes down by 30% more. By what percent has it come down in all? =
  22. 22.The price of a bicycle is ₹4320. It goes up by 15%. What is the new price (in ₹)?
  23. 23.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  24. 24.A shop sells 580 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  25. 25.A price goes up by 50% and then goes up by 40% more. By what percent has it gone up in all? =
  26. 26.A water tank holds 3580 litres. 50% of the water is used. How many litres are left?
  27. 27.A town has 420 people. Its population grows by 10%. How many people live there now?
  28. 28.A price comes down by 50% and then comes down by 50% more. By what percent has it come down in all? =
  29. 29.A shop sells 3040 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  30. 30.The price of a bicycle is ₹3740. It goes up by 15%. What is the new price (in ₹)?
  31. 31.A water tank holds 4500 litres. 15% of the water is used. How many litres are left?
  32. 32.A water tank holds 4680 litres. 30% of the water is used. How many litres are left?
  33. 33.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  34. 34.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  35. 35.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =
  36. 36.A shop sells 1640 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  37. 37.A water tank holds 3120 litres. 5% of the water is used. How many litres are left?
  38. 38.A water tank holds 3880 litres. 5% of the water is used. How many litres are left?
  39. 39.The price of a bicycle is ₹2900. It goes up by 5%. What is the new price (in ₹)?
  40. 40.The price of a school bag changes from ₹3940 to ₹5910. By what percent did it go up?

Answer key

  1. 1246
  2. 4209
  3. 32.5
  4. 50
  5. 4275
  6. 15.5
  7. 576
  8. 23.5
  9. 40
  10. 1320
  11. 5976
  12. 62.5
  13. 1026
  14. 50
  15. 36
  16. 804
  17. 43.75
  18. 25
  19. 25
  20. 1058
  21. 44
  22. 4968
  23. 31.25
  24. 725
  25. 110
  26. 1790
  27. 462
  28. 75
  29. 3648
  30. 4301
  31. 3825
  32. 3276
  33. 32
  34. 72.5
  35. 32
  36. 1886
  37. 2964
  38. 3686
  39. 3045
  40. 50

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