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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 663 · 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 340 =
  2. 2.5% of 680 =
  3. 3.15% of 500 =
  4. 4.50% of 120 =
  5. 5.1% of 770 =
  6. 6.10% of 730 =
  7. 7.10% of 490 =
  8. 8.15% of 280 =
  9. 9.15% of 620 =
  10. 10.15% of 140 =
  11. 11.10% of 210 =
  12. 12.25% of 620 =
  13. 13.15% of 190 =
  14. 14.50% of 140 =
  15. 15.10% of 760 =
  16. 16.5% of 230 =
  17. 17.10% of 670 =
  18. 18.20% of 140 =
  19. 19.10% of 690 =
  20. 20.15% of 460 =
  21. 21.1% of 320 =
  22. 22.25% of 550 =
  23. 23.1% of 490 =
  24. 24.10% of 90 =
  25. 25.25% of 760 =
  26. 26.25% of 270 =
  27. 27.1% of 720 =
  28. 28.50% of 280 =
  29. 29.10% of 350 =
  30. 30.20% of 660 =
  31. 31.25% of 330 =
  32. 32.15% of 180 =
  33. 33.5% of 180 =
  34. 34.1% of 740 =
  35. 35.1% of 680 =
  36. 36.50% of 240 =
  37. 37.5% of 230 =
  38. 38.50% of 290 =
  39. 39.25% of 400 =
  40. 40.1% of 550 =

Answer key

  1. 34
  2. 34
  3. 75
  4. 60
  5. 7.7
  6. 73
  7. 49
  8. 42
  9. 93
  10. 21
  11. 21
  12. 155
  13. 28.5
  14. 70
  15. 76
  16. 11.5
  17. 67
  18. 28
  19. 69
  20. 69
  21. 3.2
  22. 137.5
  23. 4.9
  24. 9
  25. 190
  26. 67.5
  27. 7.2
  28. 140
  29. 35
  30. 132
  31. 82.5
  32. 27
  33. 9
  34. 7.4
  35. 6.8
  36. 120
  37. 11.5
  38. 145
  39. 100
  40. 5.5

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