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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 472 · 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. 1.25% of 360 =
  2. 2.20% of 360 =
  3. 3.10% of 780 =
  4. 4.50% of 410 =
  5. 5.20% of 600 =
  6. 6.25% of 50 =
  7. 7.5% of 630 =
  8. 8.20% of 690 =
  9. 9.50% of 210 =
  10. 10.5% of 50 =
  11. 11.10% of 350 =
  12. 12.15% of 230 =
  13. 13.50% of 100 =
  14. 14.5% of 830 =
  15. 15.5% of 420 =
  16. 16.25% of 740 =
  17. 17.25% of 870 =
  18. 18.20% of 470 =
  19. 19.1% of 270 =
  20. 20.1% of 270 =
  21. 21.5% of 300 =
  22. 22.1% of 650 =
  23. 23.10% of 480 =
  24. 24.20% of 270 =
  25. 25.50% of 630 =
  26. 26.50% of 400 =
  27. 27.10% of 430 =
  28. 28.5% of 60 =
  29. 29.20% of 670 =
  30. 30.25% of 180 =
  31. 31.5% of 840 =
  32. 32.5% of 510 =
  33. 33.10% of 220 =
  34. 34.15% of 540 =
  35. 35.10% of 370 =
  36. 36.50% of 60 =
  37. 37.5% of 770 =
  38. 38.50% of 200 =
  39. 39.50% of 120 =
  40. 40.5% of 210 =

Answer key

  1. 90
  2. 72
  3. 78
  4. 205
  5. 120
  6. 12.5
  7. 31.5
  8. 138
  9. 105
  10. 2.5
  11. 35
  12. 34.5
  13. 50
  14. 41.5
  15. 21
  16. 185
  17. 217.5
  18. 94
  19. 2.7
  20. 2.7
  21. 15
  22. 6.5
  23. 48
  24. 54
  25. 315
  26. 200
  27. 43
  28. 3
  29. 134
  30. 45
  31. 42
  32. 25.5
  33. 22
  34. 81
  35. 37
  36. 30
  37. 38.5
  38. 100
  39. 60
  40. 10.5

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