← Percentage increase and decrease lesson New set →

Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 473 · 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 10% and then comes down by 20% more. By what percent has it come down in all? =
  2. 2.The price of a school bag changes from ₹1020 to ₹1530. By what percent did it go up?
  3. 3.A town has 1520 people. Its population grows by 10%. How many people live there now?
  4. 4.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  5. 5.A shop sells 4840 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  6. 6.A water tank holds 1060 litres. 40% of the water is used. How many litres are left?
  7. 7.A water tank holds 4600 litres. 10% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹3300 to ₹2640. By what percent did it come down?
  9. 9.A town has 1500 people. Its population grows by 10%. How many people live there now?
  10. 10.The price of a school bag changes from ₹2160 to ₹2484. By what percent did it go up?
  11. 11.A water tank holds 4640 litres. 20% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹2060 to ₹2575. By what percent did it go up?
  13. 13.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  14. 14.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  15. 15.A town has 2700 people. Its population grows by 10%. How many people live there now?
  16. 16.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
  17. 17.A town has 1100 people. Its population grows by 20%. How many people live there now?
  18. 18.The price of a school bag changes from ₹1580 to ₹1659. By what percent did it go up?
  19. 19.A water tank holds 4320 litres. 40% of the water is used. How many litres are left?
  20. 20.A water tank holds 2140 litres. 15% of the water is used. How many litres are left?
  21. 21.A water tank holds 4440 litres. 50% of the water is used. How many litres are left?
  22. 22.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  23. 23.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  24. 24.A water tank holds 3260 litres. 10% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹3260 to ₹3749. By what percent did it go up?
  26. 26.A shop sells 1940 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  27. 27.The price of a school bag changes from ₹4180 to ₹5852. By what percent did it go up?
  28. 28.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  29. 29.A water tank holds 1200 litres. 15% of the water is used. How many litres are left?
  30. 30.A shop sells 440 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  31. 31.The price of a bicycle is ₹2540. It goes up by 30%. What is the new price (in ₹)?
  32. 32.A water tank holds 1900 litres. 5% of the water is used. How many litres are left?
  33. 33.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  34. 34.A water tank holds 80 litres. 5% of the water is used. How many litres are left?
  35. 35.A town has 120 people. Its population grows by 10%. How many people live there now?
  36. 36.The price of a school bag changes from ₹700 to ₹840. By what percent did it go up?
  37. 37.The price of a school bag changes from ₹3840 to ₹4224. By what percent did it go up?
  38. 38.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
  39. 39.A shop sells 1120 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  40. 40.A shop sells 3580 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?

Answer key

  1. 28
  2. 50
  3. 1672
  4. 35
  5. 5566
  6. 636
  7. 4140
  8. 20
  9. 1650
  10. 15
  11. 3712
  12. 25
  13. 57.5
  14. 20.75
  15. 2970
  16. 31.25
  17. 1320
  18. 5
  19. 2592
  20. 1819
  21. 2220
  22. 27.75
  23. 61
  24. 2934
  25. 15
  26. 2037
  27. 40
  28. 46
  29. 1020
  30. 462
  31. 3302
  32. 1805
  33. 55
  34. 76
  35. 132
  36. 20
  37. 10
  38. 47
  39. 1456
  40. 4296

Free quantitative aptitude lessons, practice and worksheets at talentjr.in/quantitative-aptitude