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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 677 · 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. 1.15% of 580 =
  2. 2.20% of 120 =
  3. 3.25% of 540 =
  4. 4.20% of 770 =
  5. 5.25% of 230 =
  6. 6.10% of 830 =
  7. 7.15% of 510 =
  8. 8.5% of 220 =
  9. 9.25% of 500 =
  10. 10.10% of 790 =
  11. 11.20% of 460 =
  12. 12.20% of 310 =
  13. 13.10% of 150 =
  14. 14.50% of 90 =
  15. 15.5% of 400 =
  16. 16.1% of 470 =
  17. 17.25% of 860 =
  18. 18.5% of 140 =
  19. 19.5% of 150 =
  20. 20.20% of 900 =
  21. 21.15% of 670 =
  22. 22.1% of 350 =
  23. 23.5% of 150 =
  24. 24.10% of 510 =
  25. 25.25% of 570 =
  26. 26.1% of 450 =
  27. 27.1% of 610 =
  28. 28.25% of 180 =
  29. 29.15% of 610 =
  30. 30.10% of 240 =
  31. 31.5% of 660 =
  32. 32.10% of 520 =
  33. 33.50% of 210 =
  34. 34.10% of 690 =
  35. 35.10% of 370 =
  36. 36.5% of 20 =
  37. 37.50% of 330 =
  38. 38.15% of 430 =
  39. 39.25% of 150 =
  40. 40.25% of 340 =

Answer key

  1. 87
  2. 24
  3. 135
  4. 154
  5. 57.5
  6. 83
  7. 76.5
  8. 11
  9. 125
  10. 79
  11. 92
  12. 62
  13. 15
  14. 45
  15. 20
  16. 4.7
  17. 215
  18. 7
  19. 7.5
  20. 180
  21. 100.5
  22. 3.5
  23. 7.5
  24. 51
  25. 142.5
  26. 4.5
  27. 6.1
  28. 45
  29. 91.5
  30. 24
  31. 33
  32. 52
  33. 105
  34. 69
  35. 37
  36. 1
  37. 165
  38. 64.5
  39. 37.5
  40. 85

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