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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 465 · 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 price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  2. 2.A water tank holds 120 litres. 30% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹1860 to ₹1116. By what percent did it come down?
  4. 4.The price of a school bag changes from ₹1380 to ₹1518. By what percent did it go up?
  5. 5.A town has 4540 people. Its population grows by 50%. How many people live there now?
  6. 6.A water tank holds 1320 litres. 10% of the water is used. How many litres are left?
  7. 7.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  8. 8.The price of a school bag changes from ₹2360 to ₹3304. By what percent did it go up?
  9. 9.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  10. 10.A price comes down by 50% and then comes down by 30% more. By what percent has it come down in all? =
  11. 11.A price goes up by 30% and then comes down by 15%. By what percent has it gone up in all? =
  12. 12.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹4220 to ₹4431. By what percent did it go up?
  14. 14.The price of a school bag changes from ₹3100 to ₹4650. By what percent did it go up?
  15. 15.The price of a school bag changes from ₹880 to ₹616. By what percent did it come down?
  16. 16.The price of a bicycle is ₹3920. It goes up by 10%. What is the new price (in ₹)?
  17. 17.A water tank holds 3240 litres. 15% of the water is used. How many litres are left?
  18. 18.The price of a bicycle is ₹1380. It goes up by 30%. What is the new price (in ₹)?
  19. 19.A town has 1160 people. Its population grows by 40%. How many people live there now?
  20. 20.A town has 3200 people. Its population grows by 10%. How many people live there now?
  21. 21.The price of a school bag changes from ₹1260 to ₹882. By what percent did it come down?
  22. 22.The price of a school bag changes from ₹1340 to ₹1742. By what percent did it go up?
  23. 23.A water tank holds 4840 litres. 30% of the water is used. How many litres are left?
  24. 24.A water tank holds 4800 litres. 50% of the water is used. How many litres are left?
  25. 25.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  26. 26.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =
  27. 27.A water tank holds 2160 litres. 10% of the water is used. How many litres are left?
  28. 28.A water tank holds 2720 litres. 5% of the water is used. How many litres are left?
  29. 29.A price goes up by 40% and then comes down by 25%. By what percent has it gone up in all? =
  30. 30.A town has 3140 people. Its population grows by 15%. How many people live there now?
  31. 31.A shop sells 3400 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  32. 32.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  33. 33.A price comes down by 25% and then comes down by 20% more. By what percent has it come down in all? =
  34. 34.The price of a school bag changes from ₹3220 to ₹3542. By what percent did it go up?
  35. 35.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  36. 36.The price of a school bag changes from ₹4540 to ₹4086. By what percent did it come down?
  37. 37.A town has 3080 people. Its population grows by 10%. How many people live there now?
  38. 38.A shop sells 1000 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  39. 39.The price of a school bag changes from ₹4740 to ₹4266. By what percent did it come down?
  40. 40.The price of a school bag changes from ₹1040 to ₹520. By what percent did it come down?

Answer key

  1. 33.5
  2. 84
  3. 40
  4. 10
  5. 6810
  6. 1188
  7. 32.25
  8. 40
  9. 21
  10. 65
  11. 10.5
  12. 43
  13. 5
  14. 50
  15. 30
  16. 4312
  17. 2754
  18. 1794
  19. 1624
  20. 3520
  21. 30
  22. 30
  23. 3388
  24. 2400
  25. 43.75
  26. 32
  27. 1944
  28. 2584
  29. 5
  30. 3611
  31. 3570
  32. 46
  33. 40
  34. 10
  35. 38
  36. 10
  37. 3388
  38. 1400
  39. 10
  40. 50

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