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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 446 · 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. 1.50% of 170 =
  2. 2.10% of 790 =
  3. 3.25% of 720 =
  4. 4.1% of 310 =
  5. 5.1% of 740 =
  6. 6.50% of 830 =
  7. 7.25% of 840 =
  8. 8.10% of 250 =
  9. 9.20% of 330 =
  10. 10.1% of 260 =
  11. 11.50% of 850 =
  12. 12.25% of 70 =
  13. 13.50% of 240 =
  14. 14.10% of 570 =
  15. 15.25% of 60 =
  16. 16.50% of 710 =
  17. 17.15% of 770 =
  18. 18.5% of 840 =
  19. 19.15% of 60 =
  20. 20.50% of 650 =
  21. 21.20% of 870 =
  22. 22.1% of 840 =
  23. 23.1% of 530 =
  24. 24.20% of 160 =
  25. 25.10% of 60 =
  26. 26.15% of 900 =
  27. 27.25% of 640 =
  28. 28.1% of 460 =
  29. 29.5% of 140 =
  30. 30.10% of 230 =
  31. 31.5% of 750 =
  32. 32.25% of 850 =
  33. 33.1% of 630 =
  34. 34.10% of 710 =
  35. 35.15% of 230 =
  36. 36.20% of 580 =
  37. 37.1% of 190 =
  38. 38.1% of 560 =
  39. 39.25% of 420 =
  40. 40.25% of 740 =

Answer key

  1. 85
  2. 79
  3. 180
  4. 3.1
  5. 7.4
  6. 415
  7. 210
  8. 25
  9. 66
  10. 2.6
  11. 425
  12. 17.5
  13. 120
  14. 57
  15. 15
  16. 355
  17. 115.5
  18. 42
  19. 9
  20. 325
  21. 174
  22. 8.4
  23. 5.3
  24. 32
  25. 6
  26. 135
  27. 160
  28. 4.6
  29. 7
  30. 23
  31. 37.5
  32. 212.5
  33. 6.3
  34. 71
  35. 34.5
  36. 116
  37. 1.9
  38. 5.6
  39. 105
  40. 185

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