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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 10 · 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 70 =
  2. 2.20% of 680 =
  3. 3.15% of 30 =
  4. 4.5% of 820 =
  5. 5.1% of 270 =
  6. 6.50% of 790 =
  7. 7.1% of 870 =
  8. 8.1% of 540 =
  9. 9.5% of 460 =
  10. 10.10% of 270 =
  11. 11.25% of 470 =
  12. 12.20% of 750 =
  13. 13.5% of 740 =
  14. 14.20% of 210 =
  15. 15.25% of 260 =
  16. 16.15% of 610 =
  17. 17.5% of 880 =
  18. 18.50% of 630 =
  19. 19.1% of 160 =
  20. 20.5% of 220 =
  21. 21.25% of 360 =
  22. 22.25% of 690 =
  23. 23.5% of 160 =
  24. 24.50% of 630 =
  25. 25.5% of 830 =
  26. 26.25% of 310 =
  27. 27.20% of 290 =
  28. 28.15% of 40 =
  29. 29.25% of 470 =
  30. 30.25% of 700 =
  31. 31.25% of 120 =
  32. 32.5% of 530 =
  33. 33.25% of 160 =
  34. 34.1% of 540 =
  35. 35.25% of 500 =
  36. 36.1% of 320 =
  37. 37.1% of 100 =
  38. 38.5% of 740 =
  39. 39.10% of 640 =
  40. 40.5% of 720 =

Answer key

  1. 7
  2. 136
  3. 4.5
  4. 41
  5. 2.7
  6. 395
  7. 8.7
  8. 5.4
  9. 23
  10. 27
  11. 117.5
  12. 150
  13. 37
  14. 42
  15. 65
  16. 91.5
  17. 44
  18. 315
  19. 1.6
  20. 11
  21. 90
  22. 172.5
  23. 8
  24. 315
  25. 41.5
  26. 77.5
  27. 58
  28. 6
  29. 117.5
  30. 175
  31. 30
  32. 26.5
  33. 40
  34. 5.4
  35. 125
  36. 3.2
  37. 1
  38. 37
  39. 64
  40. 36

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