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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 779 · 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. 1.25% of 830 =
  2. 2.5% of 480 =
  3. 3.10% of 570 =
  4. 4.25% of 200 =
  5. 5.5% of 540 =
  6. 6.10% of 440 =
  7. 7.10% of 90 =
  8. 8.25% of 500 =
  9. 9.20% of 740 =
  10. 10.50% of 60 =
  11. 11.15% of 270 =
  12. 12.25% of 380 =
  13. 13.15% of 420 =
  14. 14.5% of 250 =
  15. 15.1% of 360 =
  16. 16.1% of 830 =
  17. 17.5% of 180 =
  18. 18.50% of 260 =
  19. 19.20% of 890 =
  20. 20.5% of 30 =
  21. 21.20% of 780 =
  22. 22.10% of 710 =
  23. 23.15% of 490 =
  24. 24.10% of 170 =
  25. 25.1% of 150 =
  26. 26.1% of 300 =
  27. 27.5% of 260 =
  28. 28.5% of 450 =
  29. 29.1% of 740 =
  30. 30.15% of 80 =
  31. 31.1% of 260 =
  32. 32.15% of 500 =
  33. 33.20% of 860 =
  34. 34.25% of 190 =
  35. 35.15% of 660 =
  36. 36.15% of 20 =
  37. 37.15% of 590 =
  38. 38.25% of 350 =
  39. 39.5% of 580 =
  40. 40.10% of 830 =

Answer key

  1. 207.5
  2. 24
  3. 57
  4. 50
  5. 27
  6. 44
  7. 9
  8. 125
  9. 148
  10. 30
  11. 40.5
  12. 95
  13. 63
  14. 12.5
  15. 3.6
  16. 8.3
  17. 9
  18. 130
  19. 178
  20. 1.5
  21. 156
  22. 71
  23. 73.5
  24. 17
  25. 1.5
  26. 3
  27. 13
  28. 22.5
  29. 7.4
  30. 12
  31. 2.6
  32. 75
  33. 172
  34. 47.5
  35. 99
  36. 3
  37. 88.5
  38. 87.5
  39. 29
  40. 83

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