← Percentage increase and decrease lesson New set →

Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 575 · 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 5000 litres. 25% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹3260 to ₹4238. By what percent did it go up?
  3. 3.The price of a school bag changes from ₹1360 to ₹1224. By what percent did it come down?
  4. 4.A shop sells 1020 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  5. 5.The price of a school bag changes from ₹3820 to ₹3247. By what percent did it come down?
  6. 6.A water tank holds 1540 litres. 5% of the water is used. How many litres are left?
  7. 7.The price of a bicycle is ₹2820. It goes up by 30%. What is the new price (in ₹)?
  8. 8.A water tank holds 2180 litres. 25% of the water is used. How many litres are left?
  9. 9.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  10. 10.A price goes up by 50% and then comes down by 25%. By what percent has it gone up in all? =
  11. 11.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  12. 12.The price of a school bag changes from ₹860 to ₹1032. By what percent did it go up?
  13. 13.A town has 3180 people. Its population grows by 10%. How many people live there now?
  14. 14.The price of a school bag changes from ₹3760 to ₹3196. By what percent did it come down?
  15. 15.A water tank holds 580 litres. 25% of the water is used. How many litres are left?
  16. 16.A price comes down by 25% and then comes down by 20% more. By what percent has it come down in all? =
  17. 17.A water tank holds 4320 litres. 30% of the water is used. How many litres are left?
  18. 18.A water tank holds 120 litres. 10% of the water is used. How many litres are left?
  19. 19.A town has 1440 people. Its population grows by 40%. How many people live there now?
  20. 20.A water tank holds 3540 litres. 10% of the water is used. How many litres are left?
  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.A town has 3180 people. Its population grows by 25%. How many people live there now?
  23. 23.A town has 1140 people. Its population grows by 15%. How many people live there now?
  24. 24.The price of a bicycle is ₹2520. It goes up by 30%. What is the new price (in ₹)?
  25. 25.The price of a school bag changes from ₹1480 to ₹1554. By what percent did it go up?
  26. 26.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  27. 27.The price of a school bag changes from ₹400 to ₹360. By what percent did it come down?
  28. 28.The price of a school bag changes from ₹3020 to ₹2869. By what percent did it come down?
  29. 29.The price of a school bag changes from ₹260 to ₹325. By what percent did it go up?
  30. 30.The price of a school bag changes from ₹1040 to ₹1196. By what percent did it go up?
  31. 31.A price goes up by 40% and then comes down by 20%. By what percent has it gone up in all? =
  32. 32.The price of a school bag changes from ₹2100 to ₹2940. By what percent did it go up?
  33. 33.The price of a bicycle is ₹1300. It goes up by 50%. What is the new price (in ₹)?
  34. 34.The price of a school bag changes from ₹3640 to ₹2184. By what percent did it come down?
  35. 35.A town has 2960 people. Its population grows by 25%. How many people live there now?
  36. 36.A shop sells 1680 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  37. 37.A water tank holds 2140 litres. 10% of the water is used. How many litres are left?
  38. 38.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  39. 39.A price comes down by 30% and then comes down by 20% more. By what percent has it come down in all? =
  40. 40.A town has 1700 people. Its population grows by 25%. How many people live there now?

Answer key

  1. 3750
  2. 30
  3. 10
  4. 1071
  5. 15
  6. 1463
  7. 3666
  8. 1635
  9. 38
  10. 12.5
  11. 15.5
  12. 20
  13. 3498
  14. 15
  15. 435
  16. 40
  17. 3024
  18. 108
  19. 2016
  20. 3186
  21. 27.5
  22. 3975
  23. 1311
  24. 3276
  25. 5
  26. 47.5
  27. 10
  28. 5
  29. 25
  30. 15
  31. 12
  32. 40
  33. 1950
  34. 40
  35. 3700
  36. 2184
  37. 1926
  38. 19.25
  39. 44
  40. 2125

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