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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 204 · 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 240 =
  2. 2.10% of 500 =
  3. 3.10% of 870 =
  4. 4.50% of 220 =
  5. 5.1% of 70 =
  6. 6.5% of 180 =
  7. 7.10% of 240 =
  8. 8.25% of 610 =
  9. 9.5% of 90 =
  10. 10.25% of 850 =
  11. 11.5% of 70 =
  12. 12.10% of 110 =
  13. 13.5% of 830 =
  14. 14.5% of 790 =
  15. 15.25% of 620 =
  16. 16.25% of 170 =
  17. 17.10% of 430 =
  18. 18.20% of 850 =
  19. 19.20% of 370 =
  20. 20.5% of 540 =
  21. 21.5% of 580 =
  22. 22.25% of 110 =
  23. 23.5% of 880 =
  24. 24.20% of 350 =
  25. 25.5% of 590 =
  26. 26.5% of 150 =
  27. 27.15% of 700 =
  28. 28.20% of 280 =
  29. 29.25% of 720 =
  30. 30.20% of 670 =
  31. 31.20% of 400 =
  32. 32.5% of 860 =
  33. 33.10% of 340 =
  34. 34.15% of 80 =
  35. 35.25% of 220 =
  36. 36.25% of 560 =
  37. 37.10% of 170 =
  38. 38.5% of 660 =
  39. 39.50% of 250 =
  40. 40.15% of 300 =

Answer key

  1. 24
  2. 50
  3. 87
  4. 110
  5. 0.7
  6. 9
  7. 24
  8. 152.5
  9. 4.5
  10. 212.5
  11. 3.5
  12. 11
  13. 41.5
  14. 39.5
  15. 155
  16. 42.5
  17. 43
  18. 170
  19. 74
  20. 27
  21. 29
  22. 27.5
  23. 44
  24. 70
  25. 29.5
  26. 7.5
  27. 105
  28. 56
  29. 180
  30. 134
  31. 80
  32. 43
  33. 34
  34. 12
  35. 55
  36. 140
  37. 17
  38. 33
  39. 125
  40. 45

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