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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 337 · 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 570 =
  2. 2.15% of 560 =
  3. 3.10% of 670 =
  4. 4.1% of 680 =
  5. 5.5% of 560 =
  6. 6.1% of 870 =
  7. 7.25% of 820 =
  8. 8.25% of 480 =
  9. 9.20% of 250 =
  10. 10.20% of 80 =
  11. 11.25% of 140 =
  12. 12.50% of 330 =
  13. 13.15% of 550 =
  14. 14.15% of 290 =
  15. 15.15% of 750 =
  16. 16.50% of 560 =
  17. 17.15% of 700 =
  18. 18.50% of 900 =
  19. 19.25% of 650 =
  20. 20.1% of 860 =
  21. 21.10% of 600 =
  22. 22.15% of 220 =
  23. 23.1% of 390 =
  24. 24.5% of 810 =
  25. 25.1% of 400 =
  26. 26.1% of 550 =
  27. 27.50% of 350 =
  28. 28.20% of 150 =
  29. 29.1% of 600 =
  30. 30.50% of 420 =
  31. 31.50% of 70 =
  32. 32.10% of 850 =
  33. 33.10% of 300 =
  34. 34.20% of 570 =
  35. 35.50% of 220 =
  36. 36.20% of 150 =
  37. 37.50% of 450 =
  38. 38.25% of 750 =
  39. 39.10% of 540 =
  40. 40.1% of 230 =

Answer key

  1. 57
  2. 84
  3. 67
  4. 6.8
  5. 28
  6. 8.7
  7. 205
  8. 120
  9. 50
  10. 16
  11. 35
  12. 165
  13. 82.5
  14. 43.5
  15. 112.5
  16. 280
  17. 105
  18. 450
  19. 162.5
  20. 8.6
  21. 60
  22. 33
  23. 3.9
  24. 40.5
  25. 4
  26. 5.5
  27. 175
  28. 30
  29. 6
  30. 210
  31. 35
  32. 85
  33. 30
  34. 114
  35. 110
  36. 30
  37. 225
  38. 187.5
  39. 54
  40. 2.3

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