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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 88 · 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 50 =
  2. 2.10% of 350 =
  3. 3.50% of 450 =
  4. 4.15% of 220 =
  5. 5.25% of 140 =
  6. 6.25% of 690 =
  7. 7.5% of 870 =
  8. 8.50% of 230 =
  9. 9.10% of 790 =
  10. 10.10% of 520 =
  11. 11.20% of 350 =
  12. 12.5% of 210 =
  13. 13.10% of 310 =
  14. 14.50% of 690 =
  15. 15.25% of 50 =
  16. 16.5% of 570 =
  17. 17.25% of 540 =
  18. 18.5% of 820 =
  19. 19.10% of 360 =
  20. 20.10% of 640 =
  21. 21.10% of 630 =
  22. 22.10% of 170 =
  23. 23.1% of 200 =
  24. 24.1% of 350 =
  25. 25.15% of 360 =
  26. 26.10% of 50 =
  27. 27.15% of 240 =
  28. 28.1% of 600 =
  29. 29.50% of 200 =
  30. 30.20% of 900 =
  31. 31.1% of 350 =
  32. 32.15% of 700 =
  33. 33.20% of 40 =
  34. 34.5% of 130 =
  35. 35.25% of 520 =
  36. 36.10% of 480 =
  37. 37.1% of 620 =
  38. 38.1% of 370 =
  39. 39.5% of 600 =
  40. 40.5% of 450 =

Answer key

  1. 0.5
  2. 35
  3. 225
  4. 33
  5. 35
  6. 172.5
  7. 43.5
  8. 115
  9. 79
  10. 52
  11. 70
  12. 10.5
  13. 31
  14. 345
  15. 12.5
  16. 28.5
  17. 135
  18. 41
  19. 36
  20. 64
  21. 63
  22. 17
  23. 2
  24. 3.5
  25. 54
  26. 5
  27. 36
  28. 6
  29. 100
  30. 180
  31. 3.5
  32. 105
  33. 8
  34. 6.5
  35. 130
  36. 48
  37. 6.2
  38. 3.7
  39. 30
  40. 22.5

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