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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 424 · 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. 1.25% of 170 =
  2. 2.50% of 460 =
  3. 3.15% of 660 =
  4. 4.25% of 60 =
  5. 5.15% of 450 =
  6. 6.20% of 790 =
  7. 7.10% of 200 =
  8. 8.25% of 120 =
  9. 9.50% of 100 =
  10. 10.20% of 180 =
  11. 11.10% of 750 =
  12. 12.1% of 840 =
  13. 13.50% of 120 =
  14. 14.50% of 360 =
  15. 15.5% of 50 =
  16. 16.25% of 460 =
  17. 17.1% of 380 =
  18. 18.20% of 110 =
  19. 19.25% of 200 =
  20. 20.15% of 210 =
  21. 21.25% of 550 =
  22. 22.50% of 430 =
  23. 23.50% of 870 =
  24. 24.25% of 40 =
  25. 25.10% of 340 =
  26. 26.15% of 450 =
  27. 27.15% of 730 =
  28. 28.50% of 210 =
  29. 29.25% of 240 =
  30. 30.1% of 570 =
  31. 31.15% of 20 =
  32. 32.25% of 480 =
  33. 33.15% of 620 =
  34. 34.10% of 90 =
  35. 35.15% of 420 =
  36. 36.1% of 450 =
  37. 37.15% of 650 =
  38. 38.5% of 200 =
  39. 39.15% of 380 =
  40. 40.5% of 590 =

Answer key

  1. 42.5
  2. 230
  3. 99
  4. 15
  5. 67.5
  6. 158
  7. 20
  8. 30
  9. 50
  10. 36
  11. 75
  12. 8.4
  13. 60
  14. 180
  15. 2.5
  16. 115
  17. 3.8
  18. 22
  19. 50
  20. 31.5
  21. 137.5
  22. 215
  23. 435
  24. 10
  25. 34
  26. 67.5
  27. 109.5
  28. 105
  29. 60
  30. 5.7
  31. 3
  32. 120
  33. 93
  34. 9
  35. 63
  36. 4.5
  37. 97.5
  38. 10
  39. 57
  40. 29.5

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