← Percentage increase and decrease lesson New set →

Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 448 · 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 5% and then comes down by 20% more. By what percent has it come down in all? =
  2. 2.A price goes up by 10% and then goes up by 20% more. By what percent has it gone up in all? =
  3. 3.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  4. 4.A water tank holds 3300 litres. 5% of the water is used. How many litres are left?
  5. 5.A shop sells 2580 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  6. 6.The price of a school bag changes from ₹1140 to ₹1368. By what percent did it go up?
  7. 7.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
  8. 8.A water tank holds 2780 litres. 25% of the water is used. How many litres are left?
  9. 9.A town has 1400 people. Its population grows by 10%. How many people live there now?
  10. 10.A town has 2600 people. Its population grows by 10%. How many people live there now?
  11. 11.A water tank holds 4720 litres. 25% of the water is used. How many litres are left?
  12. 12.The price of a bicycle is ₹1380. It goes up by 25%. What is the new price (in ₹)?
  13. 13.The price of a school bag changes from ₹2880 to ₹4032. By what percent did it go up?
  14. 14.A water tank holds 4800 litres. 15% of the water is used. How many litres are left?
  15. 15.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =
  16. 16.The price of a school bag changes from ₹640 to ₹960. By what percent did it go up?
  17. 17.A shop sells 4700 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  18. 18.A water tank holds 3000 litres. 5% of the water is used. How many litres are left?
  19. 19.The price of a school bag changes from ₹840 to ₹1092. By what percent did it go up?
  20. 20.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  21. 21.A water tank holds 1180 litres. 5% of the water is used. How many litres are left?
  22. 22.A water tank holds 220 litres. 10% of the water is used. How many litres are left?
  23. 23.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  24. 24.A price goes up by 30% and then goes up by 20% more. By what percent has it gone up in all? =
  25. 25.A shop sells 3200 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  26. 26.The price of a school bag changes from ₹4420 to ₹5525. By what percent did it go up?
  27. 27.The price of a school bag changes from ₹4140 to ₹4347. By what percent did it go up?
  28. 28.A town has 600 people. Its population grows by 40%. How many people live there now?
  29. 29.A shop sells 4440 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  30. 30.The price of a school bag changes from ₹1700 to ₹1615. By what percent did it come down?
  31. 31.The price of a school bag changes from ₹4080 to ₹2448. By what percent did it come down?
  32. 32.The price of a school bag changes from ₹3500 to ₹3850. By what percent did it go up?
  33. 33.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
  34. 34.A town has 4620 people. Its population grows by 30%. How many people live there now?
  35. 35.The price of a bicycle is ₹3640. It goes up by 25%. What is the new price (in ₹)?
  36. 36.A water tank holds 1380 litres. 30% of the water is used. How many litres are left?
  37. 37.A water tank holds 940 litres. 50% of the water is used. How many litres are left?
  38. 38.A water tank holds 1140 litres. 20% of the water is used. How many litres are left?
  39. 39.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  40. 40.A water tank holds 900 litres. 50% of the water is used. How many litres are left?

Answer key

  1. 24
  2. 32
  3. 18.75
  4. 3135
  5. 3870
  6. 20
  7. 14.5
  8. 2085
  9. 1540
  10. 2860
  11. 3540
  12. 1725
  13. 40
  14. 4080
  15. 28
  16. 50
  17. 5640
  18. 2850
  19. 30
  20. 47.5
  21. 1121
  22. 198
  23. 50
  24. 56
  25. 3680
  26. 25
  27. 5
  28. 840
  29. 5106
  30. 5
  31. 40
  32. 10
  33. 33
  34. 6006
  35. 4550
  36. 966
  37. 470
  38. 912
  39. 9.75
  40. 450

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