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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 568 · 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 670 =
  2. 2.10% of 360 =
  3. 3.50% of 330 =
  4. 4.5% of 370 =
  5. 5.15% of 610 =
  6. 6.10% of 810 =
  7. 7.10% of 690 =
  8. 8.15% of 70 =
  9. 9.5% of 660 =
  10. 10.10% of 410 =
  11. 11.25% of 880 =
  12. 12.20% of 670 =
  13. 13.10% of 520 =
  14. 14.10% of 40 =
  15. 15.50% of 40 =
  16. 16.50% of 140 =
  17. 17.5% of 250 =
  18. 18.5% of 650 =
  19. 19.15% of 70 =
  20. 20.50% of 550 =
  21. 21.1% of 250 =
  22. 22.25% of 820 =
  23. 23.20% of 590 =
  24. 24.25% of 320 =
  25. 25.15% of 710 =
  26. 26.25% of 440 =
  27. 27.50% of 730 =
  28. 28.15% of 900 =
  29. 29.50% of 160 =
  30. 30.50% of 660 =
  31. 31.5% of 300 =
  32. 32.50% of 840 =
  33. 33.50% of 250 =
  34. 34.10% of 610 =
  35. 35.25% of 560 =
  36. 36.10% of 300 =
  37. 37.10% of 540 =
  38. 38.50% of 380 =
  39. 39.50% of 780 =
  40. 40.20% of 590 =

Answer key

  1. 167.5
  2. 36
  3. 165
  4. 18.5
  5. 91.5
  6. 81
  7. 69
  8. 10.5
  9. 33
  10. 41
  11. 220
  12. 134
  13. 52
  14. 4
  15. 20
  16. 70
  17. 12.5
  18. 32.5
  19. 10.5
  20. 275
  21. 2.5
  22. 205
  23. 118
  24. 80
  25. 106.5
  26. 110
  27. 365
  28. 135
  29. 80
  30. 330
  31. 15
  32. 420
  33. 125
  34. 61
  35. 140
  36. 30
  37. 54
  38. 190
  39. 390
  40. 118

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