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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 707 · 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 380 =
  2. 2.15% of 350 =
  3. 3.5% of 590 =
  4. 4.5% of 740 =
  5. 5.1% of 270 =
  6. 6.20% of 110 =
  7. 7.10% of 160 =
  8. 8.15% of 210 =
  9. 9.10% of 40 =
  10. 10.20% of 250 =
  11. 11.25% of 340 =
  12. 12.25% of 560 =
  13. 13.15% of 250 =
  14. 14.5% of 270 =
  15. 15.10% of 790 =
  16. 16.25% of 240 =
  17. 17.25% of 420 =
  18. 18.5% of 140 =
  19. 19.15% of 190 =
  20. 20.25% of 70 =
  21. 21.1% of 710 =
  22. 22.50% of 140 =
  23. 23.20% of 60 =
  24. 24.5% of 360 =
  25. 25.5% of 60 =
  26. 26.10% of 380 =
  27. 27.25% of 480 =
  28. 28.15% of 240 =
  29. 29.25% of 810 =
  30. 30.1% of 60 =
  31. 31.20% of 860 =
  32. 32.25% of 450 =
  33. 33.1% of 380 =
  34. 34.25% of 140 =
  35. 35.15% of 120 =
  36. 36.5% of 190 =
  37. 37.5% of 130 =
  38. 38.5% of 610 =
  39. 39.15% of 210 =
  40. 40.50% of 500 =

Answer key

  1. 38
  2. 52.5
  3. 29.5
  4. 37
  5. 2.7
  6. 22
  7. 16
  8. 31.5
  9. 4
  10. 50
  11. 85
  12. 140
  13. 37.5
  14. 13.5
  15. 79
  16. 60
  17. 105
  18. 7
  19. 28.5
  20. 17.5
  21. 7.1
  22. 70
  23. 12
  24. 18
  25. 3
  26. 38
  27. 120
  28. 36
  29. 202.5
  30. 0.6
  31. 172
  32. 112.5
  33. 3.8
  34. 35
  35. 18
  36. 9.5
  37. 6.5
  38. 30.5
  39. 31.5
  40. 250

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