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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 213 · 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. 1.15% of 400 =
  2. 2.15% of 770 =
  3. 3.1% of 320 =
  4. 4.5% of 790 =
  5. 5.15% of 20 =
  6. 6.25% of 260 =
  7. 7.5% of 70 =
  8. 8.20% of 770 =
  9. 9.5% of 130 =
  10. 10.1% of 320 =
  11. 11.1% of 880 =
  12. 12.20% of 460 =
  13. 13.25% of 520 =
  14. 14.10% of 290 =
  15. 15.1% of 160 =
  16. 16.20% of 780 =
  17. 17.5% of 550 =
  18. 18.10% of 290 =
  19. 19.1% of 880 =
  20. 20.15% of 90 =
  21. 21.25% of 600 =
  22. 22.25% of 770 =
  23. 23.5% of 280 =
  24. 24.50% of 660 =
  25. 25.50% of 540 =
  26. 26.5% of 50 =
  27. 27.5% of 150 =
  28. 28.25% of 450 =
  29. 29.50% of 120 =
  30. 30.20% of 310 =
  31. 31.1% of 540 =
  32. 32.1% of 700 =
  33. 33.1% of 700 =
  34. 34.10% of 570 =
  35. 35.25% of 40 =
  36. 36.5% of 610 =
  37. 37.1% of 750 =
  38. 38.1% of 120 =
  39. 39.5% of 450 =
  40. 40.15% of 630 =

Answer key

  1. 60
  2. 115.5
  3. 3.2
  4. 39.5
  5. 3
  6. 65
  7. 3.5
  8. 154
  9. 6.5
  10. 3.2
  11. 8.8
  12. 92
  13. 130
  14. 29
  15. 1.6
  16. 156
  17. 27.5
  18. 29
  19. 8.8
  20. 13.5
  21. 150
  22. 192.5
  23. 14
  24. 330
  25. 270
  26. 2.5
  27. 7.5
  28. 112.5
  29. 60
  30. 62
  31. 5.4
  32. 7
  33. 7
  34. 57
  35. 10
  36. 30.5
  37. 7.5
  38. 1.2
  39. 22.5
  40. 94.5

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