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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 803 · 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. 1.15% of 270 =
  2. 2.20% of 220 =
  3. 3.10% of 450 =
  4. 4.25% of 470 =
  5. 5.25% of 80 =
  6. 6.10% of 710 =
  7. 7.50% of 490 =
  8. 8.15% of 710 =
  9. 9.25% of 600 =
  10. 10.10% of 330 =
  11. 11.20% of 850 =
  12. 12.25% of 580 =
  13. 13.50% of 660 =
  14. 14.1% of 630 =
  15. 15.10% of 790 =
  16. 16.15% of 880 =
  17. 17.50% of 220 =
  18. 18.15% of 20 =
  19. 19.20% of 670 =
  20. 20.15% of 430 =
  21. 21.15% of 720 =
  22. 22.20% of 390 =
  23. 23.1% of 380 =
  24. 24.20% of 370 =
  25. 25.20% of 620 =
  26. 26.20% of 140 =
  27. 27.10% of 80 =
  28. 28.20% of 810 =
  29. 29.15% of 670 =
  30. 30.20% of 510 =
  31. 31.25% of 380 =
  32. 32.50% of 600 =
  33. 33.20% of 660 =
  34. 34.25% of 160 =
  35. 35.5% of 660 =
  36. 36.15% of 90 =
  37. 37.15% of 460 =
  38. 38.5% of 80 =
  39. 39.10% of 80 =
  40. 40.10% of 430 =

Answer key

  1. 40.5
  2. 44
  3. 45
  4. 117.5
  5. 20
  6. 71
  7. 245
  8. 106.5
  9. 150
  10. 33
  11. 170
  12. 145
  13. 330
  14. 6.3
  15. 79
  16. 132
  17. 110
  18. 3
  19. 134
  20. 64.5
  21. 108
  22. 78
  23. 3.8
  24. 74
  25. 124
  26. 28
  27. 8
  28. 162
  29. 100.5
  30. 102
  31. 95
  32. 300
  33. 132
  34. 40
  35. 33
  36. 13.5
  37. 69
  38. 4
  39. 8
  40. 43

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