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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 823 · 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 350 =
  2. 2.10% of 660 =
  3. 3.15% of 500 =
  4. 4.25% of 280 =
  5. 5.25% of 400 =
  6. 6.10% of 210 =
  7. 7.10% of 880 =
  8. 8.20% of 160 =
  9. 9.5% of 460 =
  10. 10.15% of 540 =
  11. 11.20% of 570 =
  12. 12.5% of 790 =
  13. 13.15% of 640 =
  14. 14.10% of 750 =
  15. 15.15% of 190 =
  16. 16.50% of 110 =
  17. 17.15% of 620 =
  18. 18.5% of 560 =
  19. 19.20% of 660 =
  20. 20.50% of 90 =
  21. 21.10% of 100 =
  22. 22.15% of 900 =
  23. 23.5% of 760 =
  24. 24.50% of 170 =
  25. 25.50% of 360 =
  26. 26.20% of 450 =
  27. 27.25% of 140 =
  28. 28.25% of 510 =
  29. 29.15% of 210 =
  30. 30.50% of 830 =
  31. 31.25% of 850 =
  32. 32.20% of 680 =
  33. 33.25% of 480 =
  34. 34.5% of 650 =
  35. 35.25% of 220 =
  36. 36.1% of 800 =
  37. 37.50% of 690 =
  38. 38.10% of 520 =
  39. 39.15% of 190 =
  40. 40.10% of 730 =

Answer key

  1. 70
  2. 66
  3. 75
  4. 70
  5. 100
  6. 21
  7. 88
  8. 32
  9. 23
  10. 81
  11. 114
  12. 39.5
  13. 96
  14. 75
  15. 28.5
  16. 55
  17. 93
  18. 28
  19. 132
  20. 45
  21. 10
  22. 135
  23. 38
  24. 85
  25. 180
  26. 90
  27. 35
  28. 127.5
  29. 31.5
  30. 415
  31. 212.5
  32. 136
  33. 120
  34. 32.5
  35. 55
  36. 8
  37. 345
  38. 52
  39. 28.5
  40. 73

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