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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 227 · 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 860 =
  2. 2.10% of 820 =
  3. 3.15% of 60 =
  4. 4.50% of 190 =
  5. 5.5% of 670 =
  6. 6.50% of 170 =
  7. 7.15% of 80 =
  8. 8.10% of 580 =
  9. 9.25% of 580 =
  10. 10.20% of 290 =
  11. 11.1% of 370 =
  12. 12.1% of 730 =
  13. 13.1% of 30 =
  14. 14.5% of 260 =
  15. 15.50% of 280 =
  16. 16.50% of 890 =
  17. 17.20% of 680 =
  18. 18.20% of 680 =
  19. 19.50% of 230 =
  20. 20.25% of 780 =
  21. 21.25% of 350 =
  22. 22.15% of 210 =
  23. 23.50% of 210 =
  24. 24.50% of 100 =
  25. 25.20% of 350 =
  26. 26.5% of 70 =
  27. 27.15% of 220 =
  28. 28.20% of 540 =
  29. 29.10% of 830 =
  30. 30.10% of 770 =
  31. 31.15% of 770 =
  32. 32.50% of 550 =
  33. 33.15% of 630 =
  34. 34.20% of 200 =
  35. 35.20% of 100 =
  36. 36.15% of 120 =
  37. 37.15% of 640 =
  38. 38.10% of 100 =
  39. 39.15% of 250 =
  40. 40.5% of 170 =

Answer key

  1. 8.6
  2. 82
  3. 9
  4. 95
  5. 33.5
  6. 85
  7. 12
  8. 58
  9. 145
  10. 58
  11. 3.7
  12. 7.3
  13. 0.3
  14. 13
  15. 140
  16. 445
  17. 136
  18. 136
  19. 115
  20. 195
  21. 87.5
  22. 31.5
  23. 105
  24. 50
  25. 70
  26. 3.5
  27. 33
  28. 108
  29. 83
  30. 77
  31. 115.5
  32. 275
  33. 94.5
  34. 40
  35. 20
  36. 18
  37. 96
  38. 10
  39. 37.5
  40. 8.5

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