← Percentage increase and decrease lesson New set →

Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 116 · 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 3320 litres. 5% of the water is used. How many litres are left?
  2. 2.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  3. 3.A water tank holds 3700 litres. 25% of the water is used. How many litres are left?
  4. 4.A water tank holds 3560 litres. 40% of the water is used. How many litres are left?
  5. 5.A water tank holds 2520 litres. 50% of the water is used. How many litres are left?
  6. 6.A water tank holds 420 litres. 15% of the water is used. How many litres are left?
  7. 7.A water tank holds 2900 litres. 25% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹420 to ₹546. By what percent did it go up?
  9. 9.The price of a school bag changes from ₹1240 to ₹1364. By what percent did it go up?
  10. 10.The price of a school bag changes from ₹4500 to ₹5850. By what percent did it go up?
  11. 11.The price of a school bag changes from ₹3280 to ₹2952. By what percent did it come down?
  12. 12.A shop sells 2740 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  13. 13.A water tank holds 440 litres. 15% of the water is used. How many litres are left?
  14. 14.A water tank holds 980 litres. 15% of the water is used. How many litres are left?
  15. 15.A water tank holds 540 litres. 15% of the water is used. How many litres are left?
  16. 16.A price goes up by 40% and then goes up by 20% more. By what percent has it gone up in all? =
  17. 17.A water tank holds 3180 litres. 10% of the water is used. How many litres are left?
  18. 18.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  19. 19.A water tank holds 1920 litres. 30% of the water is used. How many litres are left?
  20. 20.A water tank holds 1260 litres. 15% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹3180 to ₹3657. By what percent did it go up?
  22. 22.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  23. 23.The price of a bicycle is ₹1200. It goes up by 10%. What is the new price (in ₹)?
  24. 24.A shop sells 2140 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  25. 25.The price of a bicycle is ₹720. It goes up by 10%. What is the new price (in ₹)?
  26. 26.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  27. 27.The price of a school bag changes from ₹2780 to ₹1390. By what percent did it come down?
  28. 28.A shop sells 2380 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  29. 29.A water tank holds 1960 litres. 25% of the water is used. How many litres are left?
  30. 30.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  31. 31.A water tank holds 1480 litres. 40% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹2040 to ₹2856. By what percent did it go up?
  33. 33.The price of a school bag changes from ₹4200 to ₹5880. By what percent did it go up?
  34. 34.The price of a school bag changes from ₹3840 to ₹3072. By what percent did it come down?
  35. 35.The price of a school bag changes from ₹2540 to ₹3302. By what percent did it go up?
  36. 36.The price of a school bag changes from ₹2440 to ₹1708. By what percent did it come down?
  37. 37.A water tank holds 660 litres. 10% of the water is used. How many litres are left?
  38. 38.The price of a bicycle is ₹4300. It goes up by 10%. What is the new price (in ₹)?
  39. 39.A price goes up by 30% and then goes up by 20% more. By what percent has it gone up in all? =
  40. 40.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =

Answer key

  1. 3154
  2. 23.5
  3. 2775
  4. 2136
  5. 1260
  6. 357
  7. 2175
  8. 30
  9. 10
  10. 30
  11. 10
  12. 3288
  13. 374
  14. 833
  15. 459
  16. 68
  17. 2862
  18. 62.5
  19. 1344
  20. 1071
  21. 15
  22. 37.5
  23. 1320
  24. 2996
  25. 792
  26. 82
  27. 50
  28. 3570
  29. 1470
  30. 26.5
  31. 888
  32. 40
  33. 40
  34. 20
  35. 30
  36. 30
  37. 594
  38. 4730
  39. 56
  40. 4.5

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