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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 552 · 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. 1.1% of 400 =
  2. 2.1% of 100 =
  3. 3.50% of 140 =
  4. 4.20% of 720 =
  5. 5.20% of 400 =
  6. 6.5% of 120 =
  7. 7.1% of 340 =
  8. 8.25% of 250 =
  9. 9.10% of 60 =
  10. 10.5% of 410 =
  11. 11.1% of 580 =
  12. 12.25% of 410 =
  13. 13.10% of 720 =
  14. 14.10% of 330 =
  15. 15.10% of 180 =
  16. 16.5% of 740 =
  17. 17.10% of 270 =
  18. 18.1% of 120 =
  19. 19.15% of 460 =
  20. 20.25% of 340 =
  21. 21.10% of 620 =
  22. 22.10% of 530 =
  23. 23.10% of 900 =
  24. 24.25% of 190 =
  25. 25.10% of 120 =
  26. 26.50% of 470 =
  27. 27.15% of 420 =
  28. 28.15% of 750 =
  29. 29.50% of 90 =
  30. 30.15% of 320 =
  31. 31.1% of 120 =
  32. 32.10% of 540 =
  33. 33.5% of 450 =
  34. 34.5% of 220 =
  35. 35.25% of 150 =
  36. 36.5% of 260 =
  37. 37.1% of 250 =
  38. 38.5% of 690 =
  39. 39.10% of 570 =
  40. 40.20% of 210 =

Answer key

  1. 4
  2. 1
  3. 70
  4. 144
  5. 80
  6. 6
  7. 3.4
  8. 62.5
  9. 6
  10. 20.5
  11. 5.8
  12. 102.5
  13. 72
  14. 33
  15. 18
  16. 37
  17. 27
  18. 1.2
  19. 69
  20. 85
  21. 62
  22. 53
  23. 90
  24. 47.5
  25. 12
  26. 235
  27. 63
  28. 112.5
  29. 45
  30. 48
  31. 1.2
  32. 54
  33. 22.5
  34. 11
  35. 37.5
  36. 13
  37. 2.5
  38. 34.5
  39. 57
  40. 42

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