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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 182 · 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 bicycle is ₹300. It goes up by 10%. What is the new price (in ₹)?
  2. 2.A town has 3480 people. Its population grows by 5%. How many people live there now?
  3. 3.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  4. 4.A water tank holds 860 litres. 50% of the water is used. How many litres are left?
  5. 5.A water tank holds 3380 litres. 20% of the water is used. How many litres are left?
  6. 6.A water tank holds 2860 litres. 30% of the water is used. How many litres are left?
  7. 7.A price comes down by 30% and then comes down by 15% more. By what percent has it come down in all? =
  8. 8.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  9. 9.A shop sells 3060 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  10. 10.The price of a school bag changes from ₹1720 to ₹1462. By what percent did it come down?
  11. 11.The price of a school bag changes from ₹180 to ₹90. By what percent did it come down?
  12. 12.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  13. 13.A water tank holds 1740 litres. 10% of the water is used. How many litres are left?
  14. 14.A water tank holds 2160 litres. 25% of the water is used. How many litres are left?
  15. 15.A water tank holds 3460 litres. 5% of the water is used. How many litres are left?
  16. 16.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  17. 17.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  18. 18.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
  19. 19.The price of a school bag changes from ₹720 to ₹1080. By what percent did it go up?
  20. 20.The price of a school bag changes from ₹1700 to ₹2125. By what percent did it go up?
  21. 21.A shop sells 3380 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  22. 22.A price goes up by 30% and then goes up by 15% more. By what percent has it gone up in all? =
  23. 23.A water tank holds 3680 litres. 20% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹2060 to ₹1957. By what percent did it come down?
  25. 25.The price of a school bag changes from ₹1220 to ₹1525. By what percent did it go up?
  26. 26.A water tank holds 3120 litres. 20% of the water is used. How many litres are left?
  27. 27.A town has 4300 people. Its population grows by 10%. How many people live there now?
  28. 28.The price of a bicycle is ₹4260. It goes up by 50%. What is the new price (in ₹)?
  29. 29.The price of a school bag changes from ₹1060 to ₹1484. By what percent did it go up?
  30. 30.The price of a school bag changes from ₹3820 to ₹3247. By what percent did it come down?
  31. 31.A water tank holds 4960 litres. 40% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹280 to ₹420. By what percent did it go up?
  33. 33.A water tank holds 1380 litres. 30% of the water is used. How many litres are left?
  34. 34.A water tank holds 680 litres. 20% of the water is used. How many litres are left?
  35. 35.A water tank holds 3920 litres. 50% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹420 to ₹336. By what percent did it come down?
  37. 37.The price of a school bag changes from ₹1180 to ₹590. By what percent did it come down?
  38. 38.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  39. 39.The price of a bicycle is ₹4600. It goes up by 20%. What is the new price (in ₹)?
  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. 330
  2. 3654
  3. 10.25
  4. 430
  5. 2704
  6. 2002
  7. 40.5
  8. 55
  9. 4590
  10. 15
  11. 50
  12. 26.5
  13. 1566
  14. 1620
  15. 3287
  16. 20.75
  17. 32.25
  18. 24
  19. 50
  20. 25
  21. 3887
  22. 49.5
  23. 2944
  24. 5
  25. 25
  26. 2496
  27. 4730
  28. 6390
  29. 40
  30. 15
  31. 2976
  32. 50
  33. 966
  34. 544
  35. 1960
  36. 20
  37. 50
  38. 54
  39. 5520
  40. 23.5

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