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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 591 · 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. 1.1% of 390 =
  2. 2.20% of 750 =
  3. 3.10% of 750 =
  4. 4.25% of 390 =
  5. 5.15% of 160 =
  6. 6.20% of 820 =
  7. 7.50% of 70 =
  8. 8.10% of 790 =
  9. 9.10% of 430 =
  10. 10.5% of 40 =
  11. 11.10% of 410 =
  12. 12.1% of 100 =
  13. 13.5% of 60 =
  14. 14.25% of 100 =
  15. 15.25% of 170 =
  16. 16.50% of 100 =
  17. 17.10% of 770 =
  18. 18.50% of 220 =
  19. 19.20% of 820 =
  20. 20.1% of 490 =
  21. 21.5% of 360 =
  22. 22.10% of 120 =
  23. 23.1% of 260 =
  24. 24.5% of 170 =
  25. 25.15% of 730 =
  26. 26.1% of 330 =
  27. 27.20% of 100 =
  28. 28.15% of 550 =
  29. 29.50% of 50 =
  30. 30.25% of 540 =
  31. 31.20% of 480 =
  32. 32.1% of 100 =
  33. 33.10% of 430 =
  34. 34.25% of 140 =
  35. 35.15% of 20 =
  36. 36.15% of 360 =
  37. 37.5% of 430 =
  38. 38.5% of 900 =
  39. 39.10% of 230 =
  40. 40.1% of 650 =

Answer key

  1. 3.9
  2. 150
  3. 75
  4. 97.5
  5. 24
  6. 164
  7. 35
  8. 79
  9. 43
  10. 2
  11. 41
  12. 1
  13. 3
  14. 25
  15. 42.5
  16. 50
  17. 77
  18. 110
  19. 164
  20. 4.9
  21. 18
  22. 12
  23. 2.6
  24. 8.5
  25. 109.5
  26. 3.3
  27. 20
  28. 82.5
  29. 25
  30. 135
  31. 96
  32. 1
  33. 43
  34. 35
  35. 3
  36. 54
  37. 21.5
  38. 45
  39. 23
  40. 6.5

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