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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 245 · 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 420 =
  2. 2.1% of 180 =
  3. 3.50% of 180 =
  4. 4.20% of 40 =
  5. 5.10% of 780 =
  6. 6.25% of 410 =
  7. 7.10% of 740 =
  8. 8.1% of 420 =
  9. 9.1% of 300 =
  10. 10.50% of 560 =
  11. 11.5% of 740 =
  12. 12.15% of 500 =
  13. 13.1% of 210 =
  14. 14.50% of 20 =
  15. 15.20% of 170 =
  16. 16.5% of 240 =
  17. 17.20% of 220 =
  18. 18.50% of 330 =
  19. 19.25% of 190 =
  20. 20.1% of 790 =
  21. 21.5% of 220 =
  22. 22.25% of 100 =
  23. 23.15% of 190 =
  24. 24.10% of 40 =
  25. 25.25% of 480 =
  26. 26.15% of 550 =
  27. 27.5% of 510 =
  28. 28.15% of 60 =
  29. 29.1% of 420 =
  30. 30.20% of 730 =
  31. 31.20% of 170 =
  32. 32.5% of 660 =
  33. 33.50% of 210 =
  34. 34.1% of 880 =
  35. 35.25% of 230 =
  36. 36.25% of 280 =
  37. 37.25% of 750 =
  38. 38.20% of 330 =
  39. 39.25% of 480 =
  40. 40.1% of 710 =

Answer key

  1. 4.2
  2. 1.8
  3. 90
  4. 8
  5. 78
  6. 102.5
  7. 74
  8. 4.2
  9. 3
  10. 280
  11. 37
  12. 75
  13. 2.1
  14. 10
  15. 34
  16. 12
  17. 44
  18. 165
  19. 47.5
  20. 7.9
  21. 11
  22. 25
  23. 28.5
  24. 4
  25. 120
  26. 82.5
  27. 25.5
  28. 9
  29. 4.2
  30. 146
  31. 34
  32. 33
  33. 105
  34. 8.8
  35. 57.5
  36. 70
  37. 187.5
  38. 66
  39. 120
  40. 7.1

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