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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 945 · 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 ₹4860 to ₹2916. By what percent did it come down?
  2. 2.A water tank holds 4900 litres. 25% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹4240 to ₹2120. By what percent did it come down?
  4. 4.A water tank holds 1080 litres. 10% of the water is used. How many litres are left?
  5. 5.A price comes down by 40% and then comes down by 40% more. By what percent has it come down in all? =
  6. 6.A shop sells 1120 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  7. 7.The price of a school bag changes from ₹2880 to ₹4320. By what percent did it go up?
  8. 8.The price of a school bag changes from ₹1240 to ₹1736. By what percent did it go up?
  9. 9.A price comes down by 15% and then comes down by 40% more. By what percent has it come down in all? =
  10. 10.The price of a bicycle is ₹800. It goes up by 30%. What is the new price (in ₹)?
  11. 11.A water tank holds 4180 litres. 10% of the water is used. How many litres are left?
  12. 12.A price comes down by 50% and then comes down by 50% more. By what percent has it come down in all? =
  13. 13.The price of a bicycle is ₹2380. It goes up by 40%. What is the new price (in ₹)?
  14. 14.The price of a school bag changes from ₹340 to ₹238. By what percent did it come down?
  15. 15.The price of a bicycle is ₹1460. It goes up by 50%. What is the new price (in ₹)?
  16. 16.A water tank holds 500 litres. 30% of the water is used. How many litres are left?
  17. 17.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  18. 18.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  19. 19.The price of a school bag changes from ₹2040 to ₹1020. By what percent did it come down?
  20. 20.A water tank holds 4080 litres. 20% of the water is used. How many litres are left?
  21. 21.A water tank holds 1000 litres. 25% of the water is used. How many litres are left?
  22. 22.A town has 4800 people. Its population grows by 40%. How many people live there now?
  23. 23.A water tank holds 4900 litres. 50% of the water is used. How many litres are left?
  24. 24.A town has 2640 people. Its population grows by 15%. How many people live there now?
  25. 25.A water tank holds 2520 litres. 50% of the water is used. How many litres are left?
  26. 26.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  27. 27.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  28. 28.The price of a school bag changes from ₹4560 to ₹3876. By what percent did it come down?
  29. 29.The price of a school bag changes from ₹160 to ₹96. By what percent did it come down?
  30. 30.A price goes up by 40% and then comes down by 15%. By what percent has it gone up in all? =
  31. 31.The price of a school bag changes from ₹3840 to ₹3264. By what percent did it come down?
  32. 32.A price comes down by 25% and then comes down by 20% more. By what percent has it come down in all? =
  33. 33.A water tank holds 620 litres. 20% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹1520 to ₹1368. By what percent did it come down?
  35. 35.The price of a school bag changes from ₹840 to ₹1008. By what percent did it go up?
  36. 36.The price of a bicycle is ₹1140. It goes up by 5%. What is the new price (in ₹)?
  37. 37.The price of a bicycle is ₹2200. It goes up by 15%. What is the new price (in ₹)?
  38. 38.A water tank holds 5000 litres. 20% of the water is used. How many litres are left?
  39. 39.A water tank holds 1640 litres. 5% of the water is used. How many litres are left?
  40. 40.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =

Answer key

  1. 40
  2. 3675
  3. 50
  4. 972
  5. 64
  6. 1232
  7. 50
  8. 40
  9. 49
  10. 1040
  11. 3762
  12. 75
  13. 3332
  14. 30
  15. 2190
  16. 350
  17. 54
  18. 26.5
  19. 50
  20. 3264
  21. 750
  22. 6720
  23. 2450
  24. 3036
  25. 1260
  26. 4.5
  27. 36.5
  28. 15
  29. 40
  30. 19
  31. 15
  32. 40
  33. 496
  34. 10
  35. 20
  36. 1197
  37. 2530
  38. 4000
  39. 1558
  40. 23.5

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