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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 479 · 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. 1.25% of 580 =
  2. 2.50% of 570 =
  3. 3.1% of 30 =
  4. 4.15% of 30 =
  5. 5.5% of 570 =
  6. 6.15% of 460 =
  7. 7.5% of 720 =
  8. 8.1% of 710 =
  9. 9.5% of 870 =
  10. 10.1% of 160 =
  11. 11.1% of 80 =
  12. 12.5% of 70 =
  13. 13.50% of 250 =
  14. 14.10% of 700 =
  15. 15.5% of 140 =
  16. 16.1% of 590 =
  17. 17.20% of 210 =
  18. 18.25% of 220 =
  19. 19.10% of 850 =
  20. 20.5% of 80 =
  21. 21.10% of 830 =
  22. 22.10% of 110 =
  23. 23.1% of 800 =
  24. 24.10% of 540 =
  25. 25.10% of 390 =
  26. 26.50% of 740 =
  27. 27.1% of 570 =
  28. 28.50% of 650 =
  29. 29.20% of 610 =
  30. 30.20% of 370 =
  31. 31.20% of 440 =
  32. 32.20% of 510 =
  33. 33.10% of 130 =
  34. 34.15% of 530 =
  35. 35.5% of 140 =
  36. 36.50% of 740 =
  37. 37.25% of 140 =
  38. 38.15% of 580 =
  39. 39.25% of 270 =
  40. 40.10% of 750 =

Answer key

  1. 145
  2. 285
  3. 0.3
  4. 4.5
  5. 28.5
  6. 69
  7. 36
  8. 7.1
  9. 43.5
  10. 1.6
  11. 0.8
  12. 3.5
  13. 125
  14. 70
  15. 7
  16. 5.9
  17. 42
  18. 55
  19. 85
  20. 4
  21. 83
  22. 11
  23. 8
  24. 54
  25. 39
  26. 370
  27. 5.7
  28. 325
  29. 122
  30. 74
  31. 88
  32. 102
  33. 13
  34. 79.5
  35. 7
  36. 370
  37. 35
  38. 87
  39. 67.5
  40. 75

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