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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 471 · 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 770 =
  2. 2.20% of 60 =
  3. 3.5% of 570 =
  4. 4.1% of 450 =
  5. 5.5% of 670 =
  6. 6.10% of 110 =
  7. 7.15% of 620 =
  8. 8.1% of 580 =
  9. 9.15% of 180 =
  10. 10.50% of 370 =
  11. 11.25% of 20 =
  12. 12.25% of 260 =
  13. 13.10% of 750 =
  14. 14.10% of 820 =
  15. 15.10% of 700 =
  16. 16.20% of 360 =
  17. 17.10% of 400 =
  18. 18.15% of 260 =
  19. 19.5% of 150 =
  20. 20.5% of 800 =
  21. 21.20% of 180 =
  22. 22.1% of 210 =
  23. 23.10% of 450 =
  24. 24.20% of 880 =
  25. 25.5% of 160 =
  26. 26.5% of 890 =
  27. 27.10% of 490 =
  28. 28.15% of 280 =
  29. 29.20% of 140 =
  30. 30.20% of 540 =
  31. 31.15% of 30 =
  32. 32.25% of 880 =
  33. 33.20% of 640 =
  34. 34.25% of 140 =
  35. 35.20% of 520 =
  36. 36.15% of 220 =
  37. 37.20% of 360 =
  38. 38.25% of 730 =
  39. 39.25% of 270 =
  40. 40.25% of 180 =

Answer key

  1. 154
  2. 12
  3. 28.5
  4. 4.5
  5. 33.5
  6. 11
  7. 93
  8. 5.8
  9. 27
  10. 185
  11. 5
  12. 65
  13. 75
  14. 82
  15. 70
  16. 72
  17. 40
  18. 39
  19. 7.5
  20. 40
  21. 36
  22. 2.1
  23. 45
  24. 176
  25. 8
  26. 44.5
  27. 49
  28. 42
  29. 28
  30. 108
  31. 4.5
  32. 220
  33. 128
  34. 35
  35. 104
  36. 33
  37. 72
  38. 182.5
  39. 67.5
  40. 45

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