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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 410 · 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. 1.15% of 500 =
  2. 2.1% of 540 =
  3. 3.20% of 90 =
  4. 4.10% of 440 =
  5. 5.25% of 740 =
  6. 6.1% of 460 =
  7. 7.10% of 380 =
  8. 8.50% of 780 =
  9. 9.50% of 680 =
  10. 10.25% of 740 =
  11. 11.50% of 200 =
  12. 12.1% of 170 =
  13. 13.25% of 660 =
  14. 14.10% of 770 =
  15. 15.25% of 20 =
  16. 16.1% of 840 =
  17. 17.20% of 500 =
  18. 18.5% of 160 =
  19. 19.50% of 360 =
  20. 20.50% of 510 =
  21. 21.10% of 190 =
  22. 22.25% of 580 =
  23. 23.50% of 90 =
  24. 24.20% of 290 =
  25. 25.20% of 80 =
  26. 26.25% of 30 =
  27. 27.10% of 490 =
  28. 28.20% of 40 =
  29. 29.15% of 890 =
  30. 30.5% of 170 =
  31. 31.50% of 450 =
  32. 32.5% of 210 =
  33. 33.20% of 20 =
  34. 34.1% of 790 =
  35. 35.1% of 690 =
  36. 36.15% of 450 =
  37. 37.1% of 770 =
  38. 38.10% of 730 =
  39. 39.5% of 670 =
  40. 40.15% of 900 =

Answer key

  1. 75
  2. 5.4
  3. 18
  4. 44
  5. 185
  6. 4.6
  7. 38
  8. 390
  9. 340
  10. 185
  11. 100
  12. 1.7
  13. 165
  14. 77
  15. 5
  16. 8.4
  17. 100
  18. 8
  19. 180
  20. 255
  21. 19
  22. 145
  23. 45
  24. 58
  25. 16
  26. 7.5
  27. 49
  28. 8
  29. 133.5
  30. 8.5
  31. 225
  32. 10.5
  33. 4
  34. 7.9
  35. 6.9
  36. 67.5
  37. 7.7
  38. 73
  39. 33.5
  40. 135

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