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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 435 · 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 260 =
  2. 2.25% of 270 =
  3. 3.20% of 310 =
  4. 4.15% of 530 =
  5. 5.10% of 670 =
  6. 6.10% of 250 =
  7. 7.5% of 120 =
  8. 8.5% of 100 =
  9. 9.20% of 860 =
  10. 10.15% of 250 =
  11. 11.5% of 310 =
  12. 12.10% of 270 =
  13. 13.5% of 550 =
  14. 14.25% of 600 =
  15. 15.50% of 480 =
  16. 16.15% of 30 =
  17. 17.5% of 520 =
  18. 18.15% of 750 =
  19. 19.50% of 680 =
  20. 20.50% of 360 =
  21. 21.1% of 60 =
  22. 22.25% of 670 =
  23. 23.10% of 760 =
  24. 24.20% of 120 =
  25. 25.5% of 690 =
  26. 26.25% of 670 =
  27. 27.5% of 550 =
  28. 28.10% of 780 =
  29. 29.15% of 120 =
  30. 30.10% of 60 =
  31. 31.10% of 370 =
  32. 32.10% of 450 =
  33. 33.1% of 110 =
  34. 34.5% of 210 =
  35. 35.25% of 660 =
  36. 36.5% of 750 =
  37. 37.20% of 510 =
  38. 38.50% of 140 =
  39. 39.10% of 280 =
  40. 40.15% of 220 =

Answer key

  1. 65
  2. 67.5
  3. 62
  4. 79.5
  5. 67
  6. 25
  7. 6
  8. 5
  9. 172
  10. 37.5
  11. 15.5
  12. 27
  13. 27.5
  14. 150
  15. 240
  16. 4.5
  17. 26
  18. 112.5
  19. 340
  20. 180
  21. 0.6
  22. 167.5
  23. 76
  24. 24
  25. 34.5
  26. 167.5
  27. 27.5
  28. 78
  29. 18
  30. 6
  31. 37
  32. 45
  33. 1.1
  34. 10.5
  35. 165
  36. 37.5
  37. 102
  38. 70
  39. 28
  40. 33

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