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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 165 · 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 400 =
  2. 2.5% of 440 =
  3. 3.10% of 710 =
  4. 4.1% of 60 =
  5. 5.25% of 140 =
  6. 6.50% of 540 =
  7. 7.20% of 570 =
  8. 8.1% of 520 =
  9. 9.15% of 360 =
  10. 10.25% of 890 =
  11. 11.10% of 240 =
  12. 12.5% of 760 =
  13. 13.5% of 550 =
  14. 14.5% of 240 =
  15. 15.5% of 190 =
  16. 16.25% of 160 =
  17. 17.50% of 220 =
  18. 18.1% of 840 =
  19. 19.50% of 760 =
  20. 20.10% of 520 =
  21. 21.1% of 200 =
  22. 22.20% of 20 =
  23. 23.50% of 690 =
  24. 24.10% of 150 =
  25. 25.1% of 830 =
  26. 26.1% of 360 =
  27. 27.5% of 600 =
  28. 28.20% of 780 =
  29. 29.20% of 400 =
  30. 30.10% of 870 =
  31. 31.5% of 780 =
  32. 32.50% of 610 =
  33. 33.10% of 460 =
  34. 34.50% of 310 =
  35. 35.25% of 160 =
  36. 36.5% of 740 =
  37. 37.1% of 700 =
  38. 38.25% of 450 =
  39. 39.25% of 740 =
  40. 40.20% of 170 =

Answer key

  1. 60
  2. 22
  3. 71
  4. 0.6
  5. 35
  6. 270
  7. 114
  8. 5.2
  9. 54
  10. 222.5
  11. 24
  12. 38
  13. 27.5
  14. 12
  15. 9.5
  16. 40
  17. 110
  18. 8.4
  19. 380
  20. 52
  21. 2
  22. 4
  23. 345
  24. 15
  25. 8.3
  26. 3.6
  27. 30
  28. 156
  29. 80
  30. 87
  31. 39
  32. 305
  33. 46
  34. 155
  35. 40
  36. 37
  37. 7
  38. 112.5
  39. 185
  40. 34

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