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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 740 · 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 440 =
  2. 2.20% of 630 =
  3. 3.10% of 780 =
  4. 4.5% of 430 =
  5. 5.25% of 440 =
  6. 6.50% of 90 =
  7. 7.10% of 870 =
  8. 8.1% of 480 =
  9. 9.50% of 70 =
  10. 10.50% of 650 =
  11. 11.5% of 690 =
  12. 12.1% of 650 =
  13. 13.25% of 280 =
  14. 14.25% of 660 =
  15. 15.5% of 410 =
  16. 16.50% of 230 =
  17. 17.15% of 540 =
  18. 18.20% of 710 =
  19. 19.20% of 520 =
  20. 20.10% of 870 =
  21. 21.15% of 650 =
  22. 22.20% of 90 =
  23. 23.5% of 270 =
  24. 24.5% of 520 =
  25. 25.50% of 390 =
  26. 26.25% of 180 =
  27. 27.25% of 470 =
  28. 28.15% of 830 =
  29. 29.1% of 660 =
  30. 30.1% of 610 =
  31. 31.1% of 360 =
  32. 32.20% of 270 =
  33. 33.5% of 900 =
  34. 34.1% of 560 =
  35. 35.50% of 610 =
  36. 36.20% of 90 =
  37. 37.10% of 90 =
  38. 38.5% of 160 =
  39. 39.1% of 20 =
  40. 40.25% of 120 =

Answer key

  1. 4.4
  2. 126
  3. 78
  4. 21.5
  5. 110
  6. 45
  7. 87
  8. 4.8
  9. 35
  10. 325
  11. 34.5
  12. 6.5
  13. 70
  14. 165
  15. 20.5
  16. 115
  17. 81
  18. 142
  19. 104
  20. 87
  21. 97.5
  22. 18
  23. 13.5
  24. 26
  25. 195
  26. 45
  27. 117.5
  28. 124.5
  29. 6.6
  30. 6.1
  31. 3.6
  32. 54
  33. 45
  34. 5.6
  35. 305
  36. 18
  37. 9
  38. 8
  39. 0.2
  40. 30

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