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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 703 · 40 questions
TalentJR

The fast method (Build from 10%): 10%: divide by 10. 1%: divide by 100. 5% = half of 10%, 20% = double 10%, 15% = 10% + 5%. 50% = half, 25% = half of a half.

NameDateTime takenScore ___ / 40
  1. 1.10% of 20 =
  2. 2.10% of 120 =
  3. 3.15% of 330 =
  4. 4.20% of 130 =
  5. 5.20% of 190 =
  6. 6.25% of 890 =
  7. 7.15% of 800 =
  8. 8.20% of 200 =
  9. 9.15% of 310 =
  10. 10.50% of 540 =
  11. 11.25% of 500 =
  12. 12.5% of 320 =
  13. 13.50% of 590 =
  14. 14.20% of 440 =
  15. 15.5% of 810 =
  16. 16.50% of 720 =
  17. 17.5% of 660 =
  18. 18.5% of 140 =
  19. 19.1% of 330 =
  20. 20.5% of 640 =
  21. 21.10% of 310 =
  22. 22.20% of 230 =
  23. 23.20% of 460 =
  24. 24.5% of 550 =
  25. 25.5% of 160 =
  26. 26.50% of 610 =
  27. 27.50% of 570 =
  28. 28.25% of 510 =
  29. 29.20% of 550 =
  30. 30.15% of 150 =
  31. 31.15% of 810 =
  32. 32.15% of 160 =
  33. 33.50% of 850 =
  34. 34.1% of 100 =
  35. 35.50% of 320 =
  36. 36.20% of 600 =
  37. 37.1% of 270 =
  38. 38.20% of 390 =
  39. 39.20% of 680 =
  40. 40.15% of 270 =

Answer key

  1. 2
  2. 12
  3. 49.5
  4. 26
  5. 38
  6. 222.5
  7. 120
  8. 40
  9. 46.5
  10. 270
  11. 125
  12. 16
  13. 295
  14. 88
  15. 40.5
  16. 360
  17. 33
  18. 7
  19. 3.3
  20. 32
  21. 31
  22. 46
  23. 92
  24. 27.5
  25. 8
  26. 305
  27. 285
  28. 127.5
  29. 110
  30. 22.5
  31. 121.5
  32. 24
  33. 425
  34. 1
  35. 160
  36. 120
  37. 2.7
  38. 78
  39. 136
  40. 40.5

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