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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 258 · 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. 1.20% of 370 =
  2. 2.5% of 790 =
  3. 3.15% of 640 =
  4. 4.25% of 900 =
  5. 5.50% of 610 =
  6. 6.10% of 770 =
  7. 7.25% of 70 =
  8. 8.25% of 740 =
  9. 9.10% of 780 =
  10. 10.5% of 690 =
  11. 11.50% of 790 =
  12. 12.10% of 160 =
  13. 13.5% of 330 =
  14. 14.50% of 580 =
  15. 15.50% of 700 =
  16. 16.5% of 70 =
  17. 17.25% of 870 =
  18. 18.10% of 50 =
  19. 19.25% of 690 =
  20. 20.15% of 30 =
  21. 21.10% of 660 =
  22. 22.10% of 860 =
  23. 23.50% of 630 =
  24. 24.15% of 490 =
  25. 25.1% of 70 =
  26. 26.50% of 880 =
  27. 27.20% of 330 =
  28. 28.20% of 380 =
  29. 29.1% of 270 =
  30. 30.20% of 60 =
  31. 31.50% of 330 =
  32. 32.25% of 190 =
  33. 33.5% of 50 =
  34. 34.1% of 900 =
  35. 35.10% of 20 =
  36. 36.15% of 160 =
  37. 37.50% of 640 =
  38. 38.15% of 110 =
  39. 39.10% of 730 =
  40. 40.25% of 520 =

Answer key

  1. 74
  2. 39.5
  3. 96
  4. 225
  5. 305
  6. 77
  7. 17.5
  8. 185
  9. 78
  10. 34.5
  11. 395
  12. 16
  13. 16.5
  14. 290
  15. 350
  16. 3.5
  17. 217.5
  18. 5
  19. 172.5
  20. 4.5
  21. 66
  22. 86
  23. 315
  24. 73.5
  25. 0.7
  26. 440
  27. 66
  28. 76
  29. 2.7
  30. 12
  31. 165
  32. 47.5
  33. 2.5
  34. 9
  35. 2
  36. 24
  37. 320
  38. 16.5
  39. 73
  40. 130

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