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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 215 · 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 860 =
  2. 2.15% of 200 =
  3. 3.15% of 810 =
  4. 4.10% of 890 =
  5. 5.10% of 750 =
  6. 6.10% of 630 =
  7. 7.15% of 250 =
  8. 8.1% of 260 =
  9. 9.10% of 560 =
  10. 10.5% of 560 =
  11. 11.50% of 170 =
  12. 12.5% of 470 =
  13. 13.10% of 180 =
  14. 14.20% of 90 =
  15. 15.15% of 350 =
  16. 16.15% of 210 =
  17. 17.50% of 230 =
  18. 18.10% of 610 =
  19. 19.20% of 500 =
  20. 20.20% of 530 =
  21. 21.5% of 80 =
  22. 22.20% of 330 =
  23. 23.15% of 190 =
  24. 24.10% of 730 =
  25. 25.20% of 200 =
  26. 26.50% of 320 =
  27. 27.50% of 280 =
  28. 28.5% of 40 =
  29. 29.20% of 400 =
  30. 30.20% of 140 =
  31. 31.25% of 130 =
  32. 32.15% of 740 =
  33. 33.25% of 850 =
  34. 34.5% of 180 =
  35. 35.5% of 630 =
  36. 36.50% of 200 =
  37. 37.10% of 280 =
  38. 38.1% of 210 =
  39. 39.25% of 800 =
  40. 40.5% of 540 =

Answer key

  1. 86
  2. 30
  3. 121.5
  4. 89
  5. 75
  6. 63
  7. 37.5
  8. 2.6
  9. 56
  10. 28
  11. 85
  12. 23.5
  13. 18
  14. 18
  15. 52.5
  16. 31.5
  17. 115
  18. 61
  19. 100
  20. 106
  21. 4
  22. 66
  23. 28.5
  24. 73
  25. 40
  26. 160
  27. 140
  28. 2
  29. 80
  30. 28
  31. 32.5
  32. 111
  33. 212.5
  34. 9
  35. 31.5
  36. 100
  37. 28
  38. 2.1
  39. 200
  40. 27

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