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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 414 · 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. 1.5% of 630 =
  2. 2.10% of 790 =
  3. 3.20% of 660 =
  4. 4.1% of 410 =
  5. 5.25% of 470 =
  6. 6.50% of 30 =
  7. 7.20% of 500 =
  8. 8.20% of 580 =
  9. 9.15% of 140 =
  10. 10.20% of 240 =
  11. 11.15% of 710 =
  12. 12.10% of 250 =
  13. 13.10% of 870 =
  14. 14.10% of 810 =
  15. 15.15% of 390 =
  16. 16.10% of 720 =
  17. 17.5% of 890 =
  18. 18.50% of 490 =
  19. 19.5% of 840 =
  20. 20.50% of 50 =
  21. 21.20% of 590 =
  22. 22.20% of 730 =
  23. 23.5% of 420 =
  24. 24.25% of 840 =
  25. 25.1% of 240 =
  26. 26.10% of 530 =
  27. 27.15% of 210 =
  28. 28.20% of 150 =
  29. 29.20% of 170 =
  30. 30.1% of 20 =
  31. 31.10% of 150 =
  32. 32.5% of 530 =
  33. 33.15% of 70 =
  34. 34.25% of 430 =
  35. 35.20% of 440 =
  36. 36.1% of 580 =
  37. 37.20% of 30 =
  38. 38.50% of 570 =
  39. 39.5% of 390 =
  40. 40.10% of 490 =

Answer key

  1. 31.5
  2. 79
  3. 132
  4. 4.1
  5. 117.5
  6. 15
  7. 100
  8. 116
  9. 21
  10. 48
  11. 106.5
  12. 25
  13. 87
  14. 81
  15. 58.5
  16. 72
  17. 44.5
  18. 245
  19. 42
  20. 25
  21. 118
  22. 146
  23. 21
  24. 210
  25. 2.4
  26. 53
  27. 31.5
  28. 30
  29. 34
  30. 0.2
  31. 15
  32. 26.5
  33. 10.5
  34. 107.5
  35. 88
  36. 5.8
  37. 6
  38. 285
  39. 19.5
  40. 49

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