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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 737 · 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 700 =
  2. 2.5% of 680 =
  3. 3.1% of 350 =
  4. 4.25% of 830 =
  5. 5.20% of 630 =
  6. 6.15% of 210 =
  7. 7.1% of 350 =
  8. 8.10% of 470 =
  9. 9.25% of 100 =
  10. 10.50% of 690 =
  11. 11.10% of 750 =
  12. 12.10% of 830 =
  13. 13.50% of 900 =
  14. 14.10% of 650 =
  15. 15.5% of 490 =
  16. 16.1% of 800 =
  17. 17.10% of 140 =
  18. 18.5% of 780 =
  19. 19.20% of 900 =
  20. 20.25% of 30 =
  21. 21.20% of 480 =
  22. 22.20% of 690 =
  23. 23.50% of 650 =
  24. 24.10% of 40 =
  25. 25.25% of 190 =
  26. 26.5% of 210 =
  27. 27.1% of 250 =
  28. 28.15% of 580 =
  29. 29.25% of 550 =
  30. 30.20% of 460 =
  31. 31.5% of 70 =
  32. 32.15% of 490 =
  33. 33.15% of 620 =
  34. 34.5% of 630 =
  35. 35.1% of 590 =
  36. 36.1% of 900 =
  37. 37.5% of 630 =
  38. 38.25% of 520 =
  39. 39.20% of 770 =
  40. 40.50% of 130 =

Answer key

  1. 70
  2. 34
  3. 3.5
  4. 207.5
  5. 126
  6. 31.5
  7. 3.5
  8. 47
  9. 25
  10. 345
  11. 75
  12. 83
  13. 450
  14. 65
  15. 24.5
  16. 8
  17. 14
  18. 39
  19. 180
  20. 7.5
  21. 96
  22. 138
  23. 325
  24. 4
  25. 47.5
  26. 10.5
  27. 2.5
  28. 87
  29. 137.5
  30. 92
  31. 3.5
  32. 73.5
  33. 93
  34. 31.5
  35. 5.9
  36. 9
  37. 31.5
  38. 130
  39. 154
  40. 65

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