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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 196 · 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 630 =
  2. 2.1% of 540 =
  3. 3.20% of 540 =
  4. 4.15% of 240 =
  5. 5.5% of 580 =
  6. 6.5% of 140 =
  7. 7.15% of 660 =
  8. 8.10% of 750 =
  9. 9.1% of 410 =
  10. 10.20% of 580 =
  11. 11.5% of 590 =
  12. 12.25% of 240 =
  13. 13.5% of 560 =
  14. 14.1% of 800 =
  15. 15.5% of 840 =
  16. 16.10% of 660 =
  17. 17.1% of 650 =
  18. 18.20% of 300 =
  19. 19.15% of 280 =
  20. 20.50% of 670 =
  21. 21.15% of 410 =
  22. 22.20% of 220 =
  23. 23.15% of 750 =
  24. 24.5% of 40 =
  25. 25.25% of 780 =
  26. 26.10% of 120 =
  27. 27.5% of 440 =
  28. 28.5% of 90 =
  29. 29.1% of 470 =
  30. 30.5% of 510 =
  31. 31.5% of 720 =
  32. 32.5% of 680 =
  33. 33.25% of 690 =
  34. 34.5% of 230 =
  35. 35.50% of 70 =
  36. 36.50% of 140 =
  37. 37.10% of 850 =
  38. 38.10% of 860 =
  39. 39.1% of 490 =
  40. 40.5% of 140 =

Answer key

  1. 63
  2. 5.4
  3. 108
  4. 36
  5. 29
  6. 7
  7. 99
  8. 75
  9. 4.1
  10. 116
  11. 29.5
  12. 60
  13. 28
  14. 8
  15. 42
  16. 66
  17. 6.5
  18. 60
  19. 42
  20. 335
  21. 61.5
  22. 44
  23. 112.5
  24. 2
  25. 195
  26. 12
  27. 22
  28. 4.5
  29. 4.7
  30. 25.5
  31. 36
  32. 34
  33. 172.5
  34. 11.5
  35. 35
  36. 70
  37. 85
  38. 86
  39. 4.9
  40. 7

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