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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 262 · 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 470 =
  2. 2.1% of 20 =
  3. 3.50% of 720 =
  4. 4.10% of 120 =
  5. 5.10% of 320 =
  6. 6.20% of 890 =
  7. 7.20% of 680 =
  8. 8.20% of 170 =
  9. 9.20% of 680 =
  10. 10.25% of 240 =
  11. 11.1% of 370 =
  12. 12.25% of 660 =
  13. 13.1% of 500 =
  14. 14.20% of 100 =
  15. 15.20% of 690 =
  16. 16.1% of 720 =
  17. 17.25% of 790 =
  18. 18.20% of 340 =
  19. 19.5% of 90 =
  20. 20.10% of 70 =
  21. 21.25% of 30 =
  22. 22.25% of 190 =
  23. 23.20% of 110 =
  24. 24.10% of 40 =
  25. 25.15% of 870 =
  26. 26.10% of 730 =
  27. 27.15% of 540 =
  28. 28.50% of 250 =
  29. 29.20% of 780 =
  30. 30.20% of 230 =
  31. 31.50% of 710 =
  32. 32.5% of 110 =
  33. 33.5% of 340 =
  34. 34.1% of 50 =
  35. 35.10% of 430 =
  36. 36.25% of 710 =
  37. 37.15% of 130 =
  38. 38.15% of 790 =
  39. 39.10% of 850 =
  40. 40.15% of 490 =

Answer key

  1. 117.5
  2. 0.2
  3. 360
  4. 12
  5. 32
  6. 178
  7. 136
  8. 34
  9. 136
  10. 60
  11. 3.7
  12. 165
  13. 5
  14. 20
  15. 138
  16. 7.2
  17. 197.5
  18. 68
  19. 4.5
  20. 7
  21. 7.5
  22. 47.5
  23. 22
  24. 4
  25. 130.5
  26. 73
  27. 81
  28. 125
  29. 156
  30. 46
  31. 355
  32. 5.5
  33. 17
  34. 0.5
  35. 43
  36. 177.5
  37. 19.5
  38. 118.5
  39. 85
  40. 73.5

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