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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 674 · 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 710 =
  2. 2.15% of 200 =
  3. 3.5% of 770 =
  4. 4.20% of 870 =
  5. 5.5% of 750 =
  6. 6.15% of 720 =
  7. 7.10% of 20 =
  8. 8.10% of 340 =
  9. 9.25% of 490 =
  10. 10.5% of 590 =
  11. 11.50% of 210 =
  12. 12.15% of 740 =
  13. 13.1% of 490 =
  14. 14.10% of 630 =
  15. 15.1% of 90 =
  16. 16.25% of 110 =
  17. 17.15% of 240 =
  18. 18.20% of 830 =
  19. 19.1% of 240 =
  20. 20.1% of 250 =
  21. 21.15% of 640 =
  22. 22.15% of 90 =
  23. 23.50% of 560 =
  24. 24.10% of 420 =
  25. 25.5% of 270 =
  26. 26.5% of 260 =
  27. 27.5% of 110 =
  28. 28.50% of 820 =
  29. 29.10% of 70 =
  30. 30.5% of 570 =
  31. 31.15% of 830 =
  32. 32.50% of 820 =
  33. 33.15% of 90 =
  34. 34.20% of 270 =
  35. 35.50% of 160 =
  36. 36.25% of 160 =
  37. 37.10% of 770 =
  38. 38.1% of 350 =
  39. 39.25% of 330 =
  40. 40.5% of 190 =

Answer key

  1. 142
  2. 30
  3. 38.5
  4. 174
  5. 37.5
  6. 108
  7. 2
  8. 34
  9. 122.5
  10. 29.5
  11. 105
  12. 111
  13. 4.9
  14. 63
  15. 0.9
  16. 27.5
  17. 36
  18. 166
  19. 2.4
  20. 2.5
  21. 96
  22. 13.5
  23. 280
  24. 42
  25. 13.5
  26. 13
  27. 5.5
  28. 410
  29. 7
  30. 28.5
  31. 124.5
  32. 410
  33. 13.5
  34. 54
  35. 80
  36. 40
  37. 77
  38. 3.5
  39. 82.5
  40. 9.5

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