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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 403 · 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 900 =
  2. 2.20% of 330 =
  3. 3.50% of 120 =
  4. 4.15% of 490 =
  5. 5.25% of 770 =
  6. 6.15% of 720 =
  7. 7.15% of 420 =
  8. 8.15% of 260 =
  9. 9.20% of 290 =
  10. 10.25% of 810 =
  11. 11.5% of 650 =
  12. 12.5% of 80 =
  13. 13.5% of 810 =
  14. 14.10% of 230 =
  15. 15.25% of 680 =
  16. 16.10% of 190 =
  17. 17.20% of 80 =
  18. 18.50% of 540 =
  19. 19.25% of 110 =
  20. 20.20% of 610 =
  21. 21.15% of 260 =
  22. 22.20% of 230 =
  23. 23.25% of 680 =
  24. 24.25% of 840 =
  25. 25.15% of 800 =
  26. 26.50% of 450 =
  27. 27.15% of 880 =
  28. 28.50% of 750 =
  29. 29.10% of 410 =
  30. 30.50% of 580 =
  31. 31.20% of 240 =
  32. 32.15% of 530 =
  33. 33.20% of 780 =
  34. 34.20% of 40 =
  35. 35.10% of 470 =
  36. 36.50% of 150 =
  37. 37.10% of 550 =
  38. 38.20% of 870 =
  39. 39.20% of 350 =
  40. 40.15% of 90 =

Answer key

  1. 9
  2. 66
  3. 60
  4. 73.5
  5. 192.5
  6. 108
  7. 63
  8. 39
  9. 58
  10. 202.5
  11. 32.5
  12. 4
  13. 40.5
  14. 23
  15. 170
  16. 19
  17. 16
  18. 270
  19. 27.5
  20. 122
  21. 39
  22. 46
  23. 170
  24. 210
  25. 120
  26. 225
  27. 132
  28. 375
  29. 41
  30. 290
  31. 48
  32. 79.5
  33. 156
  34. 8
  35. 47
  36. 75
  37. 55
  38. 174
  39. 70
  40. 13.5

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