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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 366 · 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 110 =
  2. 2.10% of 140 =
  3. 3.5% of 220 =
  4. 4.50% of 720 =
  5. 5.50% of 360 =
  6. 6.10% of 580 =
  7. 7.50% of 370 =
  8. 8.1% of 80 =
  9. 9.10% of 540 =
  10. 10.50% of 480 =
  11. 11.1% of 170 =
  12. 12.50% of 570 =
  13. 13.20% of 200 =
  14. 14.1% of 100 =
  15. 15.10% of 350 =
  16. 16.20% of 570 =
  17. 17.25% of 650 =
  18. 18.25% of 420 =
  19. 19.50% of 650 =
  20. 20.15% of 40 =
  21. 21.1% of 430 =
  22. 22.1% of 660 =
  23. 23.50% of 160 =
  24. 24.10% of 420 =
  25. 25.20% of 850 =
  26. 26.15% of 650 =
  27. 27.15% of 700 =
  28. 28.1% of 760 =
  29. 29.15% of 190 =
  30. 30.50% of 890 =
  31. 31.5% of 860 =
  32. 32.15% of 450 =
  33. 33.10% of 420 =
  34. 34.1% of 560 =
  35. 35.20% of 450 =
  36. 36.15% of 270 =
  37. 37.15% of 730 =
  38. 38.50% of 50 =
  39. 39.15% of 200 =
  40. 40.20% of 150 =

Answer key

  1. 11
  2. 14
  3. 11
  4. 360
  5. 180
  6. 58
  7. 185
  8. 0.8
  9. 54
  10. 240
  11. 1.7
  12. 285
  13. 40
  14. 1
  15. 35
  16. 114
  17. 162.5
  18. 105
  19. 325
  20. 6
  21. 4.3
  22. 6.6
  23. 80
  24. 42
  25. 170
  26. 97.5
  27. 105
  28. 7.6
  29. 28.5
  30. 445
  31. 43
  32. 67.5
  33. 42
  34. 5.6
  35. 90
  36. 40.5
  37. 109.5
  38. 25
  39. 30
  40. 30

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