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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 249 · 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 ₹1000 to ₹800. By what percent did it come down?
  2. 2.A town has 240 people. Its population grows by 10%. How many people live there now?
  3. 3.The price of a school bag changes from ₹1220 to ₹1037. By what percent did it come down?
  4. 4.A water tank holds 2780 litres. 5% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹3400 to ₹2380. By what percent did it come down?
  6. 6.The price of a school bag changes from ₹3960 to ₹4356. By what percent did it go up?
  7. 7.A shop sells 1680 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  8. 8.A town has 920 people. Its population grows by 5%. How many people live there now?
  9. 9.A town has 2260 people. Its population grows by 50%. How many people live there now?
  10. 10.A price goes up by 40% and then goes up by 50% more. By what percent has it gone up in all? =
  11. 11.The price of a school bag changes from ₹1840 to ₹1932. By what percent did it go up?
  12. 12.The price of a bicycle is ₹1080. It goes up by 10%. What is the new price (in ₹)?
  13. 13.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  14. 14.The price of a school bag changes from ₹1040 to ₹624. By what percent did it come down?
  15. 15.The price of a school bag changes from ₹3100 to ₹2635. By what percent did it come down?
  16. 16.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  17. 17.The price of a school bag changes from ₹1500 to ₹1350. By what percent did it come down?
  18. 18.A shop sells 2920 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  19. 19.A water tank holds 2620 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 30% more. By what percent has it come down in all? =
  21. 21.A water tank holds 2260 litres. 15% of the water is used. How many litres are left?
  22. 22.A water tank holds 3700 litres. 5% of the water is used. How many litres are left?
  23. 23.The price of a school bag changes from ₹4440 to ₹6660. By what percent did it go up?
  24. 24.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  25. 25.A price goes up by 40% and then comes down by 10%. By what percent has it gone up in all? =
  26. 26.The price of a school bag changes from ₹1660 to ₹1992. By what percent did it go up?
  27. 27.The price of a bicycle is ₹1280. It goes up by 25%. What is the new price (in ₹)?
  28. 28.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  29. 29.A water tank holds 3220 litres. 10% of the water is used. How many litres are left?
  30. 30.A town has 2420 people. Its population grows by 20%. How many people live there now?
  31. 31.The price of a school bag changes from ₹3760 to ₹4888. By what percent did it go up?
  32. 32.A water tank holds 4460 litres. 25% of the water is used. How many litres are left?
  33. 33.The price of a bicycle is ₹160. It goes up by 30%. What is the new price (in ₹)?
  34. 34.A water tank holds 1380 litres. 25% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹4220 to ₹5064. By what percent did it go up?
  36. 36.A shop sells 2000 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  37. 37.A water tank holds 4660 litres. 25% of the water is used. How many litres are left?
  38. 38.A water tank holds 1040 litres. 10% of the water is used. How many litres are left?
  39. 39.A water tank holds 3680 litres. 5% of the water is used. How many litres are left?
  40. 40.A water tank holds 1680 litres. 15% of the water is used. How many litres are left?

Answer key

  1. 20
  2. 264
  3. 15
  4. 2641
  5. 30
  6. 10
  7. 2352
  8. 966
  9. 3390
  10. 110
  11. 5
  12. 1188
  13. 28.75
  14. 40
  15. 15
  16. 37.5
  17. 10
  18. 3796
  19. 1965
  20. 44
  21. 1921
  22. 3515
  23. 50
  24. 55
  25. 26
  26. 20
  27. 1600
  28. 72.5
  29. 2898
  30. 2904
  31. 30
  32. 3345
  33. 208
  34. 1035
  35. 20
  36. 2600
  37. 3495
  38. 936
  39. 3496
  40. 1428

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