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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 302 · 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. 1.20% of 70 =
  2. 2.50% of 70 =
  3. 3.20% of 440 =
  4. 4.1% of 880 =
  5. 5.10% of 160 =
  6. 6.5% of 650 =
  7. 7.10% of 300 =
  8. 8.5% of 430 =
  9. 9.50% of 440 =
  10. 10.5% of 240 =
  11. 11.10% of 580 =
  12. 12.20% of 520 =
  13. 13.10% of 800 =
  14. 14.25% of 370 =
  15. 15.10% of 140 =
  16. 16.10% of 670 =
  17. 17.1% of 830 =
  18. 18.25% of 580 =
  19. 19.5% of 250 =
  20. 20.10% of 740 =
  21. 21.1% of 20 =
  22. 22.1% of 390 =
  23. 23.5% of 70 =
  24. 24.10% of 590 =
  25. 25.15% of 560 =
  26. 26.5% of 650 =
  27. 27.15% of 390 =
  28. 28.15% of 220 =
  29. 29.1% of 190 =
  30. 30.5% of 870 =
  31. 31.20% of 70 =
  32. 32.20% of 560 =
  33. 33.20% of 450 =
  34. 34.25% of 660 =
  35. 35.5% of 440 =
  36. 36.5% of 790 =
  37. 37.15% of 860 =
  38. 38.15% of 100 =
  39. 39.10% of 270 =
  40. 40.1% of 670 =

Answer key

  1. 14
  2. 35
  3. 88
  4. 8.8
  5. 16
  6. 32.5
  7. 30
  8. 21.5
  9. 220
  10. 12
  11. 58
  12. 104
  13. 80
  14. 92.5
  15. 14
  16. 67
  17. 8.3
  18. 145
  19. 12.5
  20. 74
  21. 0.2
  22. 3.9
  23. 3.5
  24. 59
  25. 84
  26. 32.5
  27. 58.5
  28. 33
  29. 1.9
  30. 43.5
  31. 14
  32. 112
  33. 90
  34. 165
  35. 22
  36. 39.5
  37. 129
  38. 15
  39. 27
  40. 6.7

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