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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 312 · 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 520 =
  2. 2.20% of 510 =
  3. 3.5% of 60 =
  4. 4.25% of 750 =
  5. 5.15% of 90 =
  6. 6.1% of 760 =
  7. 7.10% of 720 =
  8. 8.1% of 440 =
  9. 9.10% of 420 =
  10. 10.5% of 840 =
  11. 11.10% of 360 =
  12. 12.10% of 30 =
  13. 13.20% of 50 =
  14. 14.25% of 20 =
  15. 15.15% of 190 =
  16. 16.15% of 760 =
  17. 17.50% of 360 =
  18. 18.50% of 90 =
  19. 19.25% of 320 =
  20. 20.10% of 310 =
  21. 21.20% of 280 =
  22. 22.15% of 250 =
  23. 23.50% of 170 =
  24. 24.15% of 260 =
  25. 25.15% of 520 =
  26. 26.5% of 900 =
  27. 27.5% of 890 =
  28. 28.5% of 320 =
  29. 29.50% of 210 =
  30. 30.50% of 610 =
  31. 31.10% of 900 =
  32. 32.1% of 70 =
  33. 33.10% of 300 =
  34. 34.10% of 500 =
  35. 35.20% of 540 =
  36. 36.10% of 580 =
  37. 37.10% of 340 =
  38. 38.1% of 180 =
  39. 39.15% of 540 =
  40. 40.15% of 800 =

Answer key

  1. 52
  2. 102
  3. 3
  4. 187.5
  5. 13.5
  6. 7.6
  7. 72
  8. 4.4
  9. 42
  10. 42
  11. 36
  12. 3
  13. 10
  14. 5
  15. 28.5
  16. 114
  17. 180
  18. 45
  19. 80
  20. 31
  21. 56
  22. 37.5
  23. 85
  24. 39
  25. 78
  26. 45
  27. 44.5
  28. 16
  29. 105
  30. 305
  31. 90
  32. 0.7
  33. 30
  34. 50
  35. 108
  36. 58
  37. 34
  38. 1.8
  39. 81
  40. 120

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