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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 280 · 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. 1.10% of 120 =
  2. 2.50% of 80 =
  3. 3.50% of 100 =
  4. 4.25% of 80 =
  5. 5.20% of 670 =
  6. 6.10% of 30 =
  7. 7.10% of 500 =
  8. 8.1% of 660 =
  9. 9.15% of 670 =
  10. 10.50% of 20 =
  11. 11.20% of 680 =
  12. 12.10% of 870 =
  13. 13.10% of 350 =
  14. 14.1% of 320 =
  15. 15.10% of 210 =
  16. 16.20% of 550 =
  17. 17.1% of 80 =
  18. 18.50% of 390 =
  19. 19.10% of 710 =
  20. 20.5% of 140 =
  21. 21.50% of 660 =
  22. 22.25% of 820 =
  23. 23.25% of 110 =
  24. 24.15% of 110 =
  25. 25.20% of 390 =
  26. 26.5% of 890 =
  27. 27.20% of 700 =
  28. 28.1% of 850 =
  29. 29.1% of 800 =
  30. 30.1% of 800 =
  31. 31.15% of 260 =
  32. 32.15% of 750 =
  33. 33.50% of 100 =
  34. 34.1% of 330 =
  35. 35.25% of 880 =
  36. 36.50% of 410 =
  37. 37.15% of 710 =
  38. 38.10% of 60 =
  39. 39.10% of 570 =
  40. 40.10% of 30 =

Answer key

  1. 12
  2. 40
  3. 50
  4. 20
  5. 134
  6. 3
  7. 50
  8. 6.6
  9. 100.5
  10. 10
  11. 136
  12. 87
  13. 35
  14. 3.2
  15. 21
  16. 110
  17. 0.8
  18. 195
  19. 71
  20. 7
  21. 330
  22. 205
  23. 27.5
  24. 16.5
  25. 78
  26. 44.5
  27. 140
  28. 8.5
  29. 8
  30. 8
  31. 39
  32. 112.5
  33. 50
  34. 3.3
  35. 220
  36. 205
  37. 106.5
  38. 6
  39. 57
  40. 3

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