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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 299 · 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. 1.20% of 670 =
  2. 2.15% of 560 =
  3. 3.15% of 260 =
  4. 4.20% of 270 =
  5. 5.1% of 140 =
  6. 6.1% of 520 =
  7. 7.50% of 850 =
  8. 8.20% of 360 =
  9. 9.10% of 60 =
  10. 10.20% of 340 =
  11. 11.15% of 550 =
  12. 12.1% of 840 =
  13. 13.1% of 150 =
  14. 14.15% of 730 =
  15. 15.50% of 30 =
  16. 16.25% of 520 =
  17. 17.15% of 130 =
  18. 18.20% of 470 =
  19. 19.20% of 410 =
  20. 20.10% of 360 =
  21. 21.1% of 760 =
  22. 22.5% of 740 =
  23. 23.25% of 510 =
  24. 24.5% of 200 =
  25. 25.25% of 830 =
  26. 26.50% of 440 =
  27. 27.25% of 610 =
  28. 28.15% of 120 =
  29. 29.10% of 340 =
  30. 30.20% of 720 =
  31. 31.15% of 540 =
  32. 32.20% of 510 =
  33. 33.5% of 710 =
  34. 34.15% of 250 =
  35. 35.20% of 520 =
  36. 36.15% of 890 =
  37. 37.1% of 50 =
  38. 38.10% of 380 =
  39. 39.5% of 360 =
  40. 40.10% of 250 =

Answer key

  1. 134
  2. 84
  3. 39
  4. 54
  5. 1.4
  6. 5.2
  7. 425
  8. 72
  9. 6
  10. 68
  11. 82.5
  12. 8.4
  13. 1.5
  14. 109.5
  15. 15
  16. 130
  17. 19.5
  18. 94
  19. 82
  20. 36
  21. 7.6
  22. 37
  23. 127.5
  24. 10
  25. 207.5
  26. 220
  27. 152.5
  28. 18
  29. 34
  30. 144
  31. 81
  32. 102
  33. 35.5
  34. 37.5
  35. 104
  36. 133.5
  37. 0.5
  38. 38
  39. 18
  40. 25

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