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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 365 · 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 2140 litres. 40% of the water is used. How many litres are left?
  2. 2.The price of a bicycle is ₹5000. It goes up by 50%. What is the new price (in ₹)?
  3. 3.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  4. 4.A price comes down by 25% and then comes down by 50% more. By what percent has it come down in all? =
  5. 5.A town has 940 people. Its population grows by 30%. How many people live there now?
  6. 6.A water tank holds 1000 litres. 50% of the water is used. How many litres are left?
  7. 7.A price goes up by 25% and then comes down by 10%. By what percent has it gone up in all? =
  8. 8.The price of a school bag changes from ₹4180 to ₹5016. By what percent did it go up?
  9. 9.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  10. 10.The price of a school bag changes from ₹3220 to ₹2737. By what percent did it come down?
  11. 11.The price of a school bag changes from ₹2400 to ₹3120. By what percent did it go up?
  12. 12.The price of a school bag changes from ₹200 to ₹120. By what percent did it come down?
  13. 13.A water tank holds 1700 litres. 15% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹2740 to ₹2877. By what percent did it go up?
  15. 15.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  16. 16.A shop sells 4300 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  17. 17.The price of a school bag changes from ₹820 to ₹1025. By what percent did it go up?
  18. 18.A town has 4760 people. Its population grows by 10%. How many people live there now?
  19. 19.The price of a school bag changes from ₹3600 to ₹3780. By what percent did it go up?
  20. 20.The price of a bicycle is ₹960. It goes up by 15%. What is the new price (in ₹)?
  21. 21.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  22. 22.The price of a school bag changes from ₹3500 to ₹2450. By what percent did it come down?
  23. 23.A town has 4320 people. Its population grows by 10%. How many people live there now?
  24. 24.A town has 3880 people. Its population grows by 30%. How many people live there now?
  25. 25.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  26. 26.A shop sells 3280 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  27. 27.A water tank holds 4860 litres. 15% of the water is used. How many litres are left?
  28. 28.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  29. 29.A price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =
  30. 30.A water tank holds 2440 litres. 40% of the water is used. How many litres are left?
  31. 31.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  32. 32.The price of a school bag changes from ₹200 to ₹140. By what percent did it come down?
  33. 33.A town has 1440 people. Its population grows by 5%. How many people live there now?
  34. 34.A water tank holds 3960 litres. 25% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹2940 to ₹3234. By what percent did it go up?
  36. 36.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  37. 37.The price of a school bag changes from ₹3520 to ₹2640. By what percent did it come down?
  38. 38.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
  39. 39.The price of a school bag changes from ₹3020 to ₹2265. By what percent did it come down?
  40. 40.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =

Answer key

  1. 1284
  2. 7500
  3. 52.5
  4. 62.5
  5. 1222
  6. 500
  7. 12.5
  8. 20
  9. 23.5
  10. 15
  11. 30
  12. 40
  13. 1445
  14. 5
  15. 36.25
  16. 6450
  17. 25
  18. 5236
  19. 5
  20. 1104
  21. 27.5
  22. 30
  23. 4752
  24. 5044
  25. 55
  26. 3772
  27. 4131
  28. 26.5
  29. 58
  30. 1464
  31. 80
  32. 30
  33. 1512
  34. 2970
  35. 10
  36. 65
  37. 25
  38. 14
  39. 25
  40. 21

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