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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 371 · 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 30 =
  2. 2.25% of 320 =
  3. 3.5% of 330 =
  4. 4.50% of 140 =
  5. 5.15% of 90 =
  6. 6.20% of 300 =
  7. 7.5% of 330 =
  8. 8.50% of 220 =
  9. 9.50% of 730 =
  10. 10.5% of 70 =
  11. 11.10% of 20 =
  12. 12.10% of 320 =
  13. 13.25% of 40 =
  14. 14.5% of 280 =
  15. 15.1% of 780 =
  16. 16.15% of 520 =
  17. 17.20% of 80 =
  18. 18.20% of 510 =
  19. 19.1% of 80 =
  20. 20.1% of 490 =
  21. 21.25% of 300 =
  22. 22.1% of 370 =
  23. 23.15% of 690 =
  24. 24.25% of 660 =
  25. 25.10% of 30 =
  26. 26.20% of 470 =
  27. 27.10% of 650 =
  28. 28.50% of 730 =
  29. 29.1% of 150 =
  30. 30.10% of 40 =
  31. 31.20% of 840 =
  32. 32.1% of 250 =
  33. 33.25% of 860 =
  34. 34.25% of 290 =
  35. 35.25% of 150 =
  36. 36.25% of 590 =
  37. 37.20% of 280 =
  38. 38.10% of 270 =
  39. 39.5% of 720 =
  40. 40.20% of 330 =

Answer key

  1. 1.5
  2. 80
  3. 16.5
  4. 70
  5. 13.5
  6. 60
  7. 16.5
  8. 110
  9. 365
  10. 3.5
  11. 2
  12. 32
  13. 10
  14. 14
  15. 7.8
  16. 78
  17. 16
  18. 102
  19. 0.8
  20. 4.9
  21. 75
  22. 3.7
  23. 103.5
  24. 165
  25. 3
  26. 94
  27. 65
  28. 365
  29. 1.5
  30. 4
  31. 168
  32. 2.5
  33. 215
  34. 72.5
  35. 37.5
  36. 147.5
  37. 56
  38. 27
  39. 36
  40. 66

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