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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 418 · 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 ₹3280 to ₹2460. By what percent did it come down?
  2. 2.A price goes up by 40% and then comes down by 15%. By what percent has it gone up in all? =
  3. 3.A town has 4480 people. Its population grows by 30%. How many people live there now?
  4. 4.A town has 160 people. Its population grows by 5%. How many people live there now?
  5. 5.A water tank holds 440 litres. 50% of the water is used. How many litres are left?
  6. 6.The price of a school bag changes from ₹4120 to ₹4326. By what percent did it go up?
  7. 7.A water tank holds 920 litres. 20% of the water is used. How many litres are left?
  8. 8.A water tank holds 2500 litres. 50% of the water is used. How many litres are left?
  9. 9.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  10. 10.A shop sells 2860 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  11. 11.A water tank holds 4540 litres. 15% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹3760 to ₹3196. By what percent did it come down?
  13. 13.A water tank holds 3340 litres. 15% of the water is used. How many litres are left?
  14. 14.A shop sells 1400 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  15. 15.The price of a school bag changes from ₹2040 to ₹1836. By what percent did it come down?
  16. 16.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  17. 17.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  18. 18.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  19. 19.A shop sells 1380 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  20. 20.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  21. 21.A price goes up by 10% and then goes up by 20% more. By what percent has it gone up in all? =
  22. 22.The price of a school bag changes from ₹960 to ₹1056. By what percent did it go up?
  23. 23.The price of a school bag changes from ₹4560 to ₹5016. By what percent did it go up?
  24. 24.The price of a school bag changes from ₹3080 to ₹2926. By what percent did it come down?
  25. 25.The price of a school bag changes from ₹4800 to ₹4080. By what percent did it come down?
  26. 26.A water tank holds 4440 litres. 30% of the water is used. How many litres are left?
  27. 27.A town has 4840 people. Its population grows by 10%. How many people live there now?
  28. 28.A price comes down by 30% and then comes down by 15% more. By what percent has it come down in all? =
  29. 29.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  30. 30.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  31. 31.A water tank holds 2380 litres. 10% of the water is used. How many litres are left?
  32. 32.A town has 1120 people. Its population grows by 25%. How many people live there now?
  33. 33.The price of a school bag changes from ₹400 to ₹360. By what percent did it come down?
  34. 34.A shop sells 3680 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  35. 35.The price of a school bag changes from ₹140 to ₹105. By what percent did it come down?
  36. 36.The price of a school bag changes from ₹140 to ₹147. By what percent did it go up?
  37. 37.A water tank holds 4960 litres. 5% of the water is used. How many litres are left?
  38. 38.A water tank holds 4680 litres. 20% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹340 to ₹170. By what percent did it come down?
  40. 40.A town has 1540 people. Its population grows by 25%. How many people live there now?

Answer key

  1. 25
  2. 19
  3. 5824
  4. 168
  5. 220
  6. 5
  7. 736
  8. 1250
  9. 47
  10. 4290
  11. 3859
  12. 15
  13. 2839
  14. 1820
  15. 10
  16. 26
  17. 36.5
  18. 27.5
  19. 1449
  20. 15.5
  21. 32
  22. 10
  23. 10
  24. 5
  25. 15
  26. 3108
  27. 5324
  28. 40.5
  29. 47.5
  30. 28.75
  31. 2142
  32. 1400
  33. 10
  34. 4048
  35. 25
  36. 5
  37. 4712
  38. 3744
  39. 50
  40. 1925

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