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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 75 · 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 580 =
  2. 2.15% of 870 =
  3. 3.5% of 630 =
  4. 4.5% of 740 =
  5. 5.10% of 780 =
  6. 6.50% of 720 =
  7. 7.5% of 700 =
  8. 8.25% of 750 =
  9. 9.10% of 590 =
  10. 10.20% of 770 =
  11. 11.25% of 260 =
  12. 12.10% of 150 =
  13. 13.25% of 250 =
  14. 14.25% of 310 =
  15. 15.25% of 560 =
  16. 16.20% of 20 =
  17. 17.25% of 520 =
  18. 18.50% of 240 =
  19. 19.25% of 750 =
  20. 20.5% of 520 =
  21. 21.25% of 100 =
  22. 22.25% of 440 =
  23. 23.50% of 20 =
  24. 24.10% of 770 =
  25. 25.20% of 860 =
  26. 26.5% of 240 =
  27. 27.50% of 400 =
  28. 28.50% of 580 =
  29. 29.10% of 430 =
  30. 30.15% of 270 =
  31. 31.50% of 70 =
  32. 32.5% of 680 =
  33. 33.15% of 240 =
  34. 34.1% of 380 =
  35. 35.20% of 170 =
  36. 36.1% of 520 =
  37. 37.5% of 880 =
  38. 38.1% of 300 =
  39. 39.10% of 90 =
  40. 40.25% of 20 =

Answer key

  1. 58
  2. 130.5
  3. 31.5
  4. 37
  5. 78
  6. 360
  7. 35
  8. 187.5
  9. 59
  10. 154
  11. 65
  12. 15
  13. 62.5
  14. 77.5
  15. 140
  16. 4
  17. 130
  18. 120
  19. 187.5
  20. 26
  21. 25
  22. 110
  23. 10
  24. 77
  25. 172
  26. 12
  27. 200
  28. 290
  29. 43
  30. 40.5
  31. 35
  32. 34
  33. 36
  34. 3.8
  35. 34
  36. 5.2
  37. 44
  38. 3
  39. 9
  40. 5

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