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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 41 · 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 320 =
  2. 2.5% of 600 =
  3. 3.20% of 570 =
  4. 4.10% of 170 =
  5. 5.10% of 300 =
  6. 6.20% of 760 =
  7. 7.10% of 780 =
  8. 8.5% of 680 =
  9. 9.5% of 680 =
  10. 10.50% of 90 =
  11. 11.15% of 510 =
  12. 12.50% of 830 =
  13. 13.10% of 190 =
  14. 14.25% of 310 =
  15. 15.10% of 260 =
  16. 16.50% of 220 =
  17. 17.25% of 170 =
  18. 18.20% of 680 =
  19. 19.25% of 240 =
  20. 20.10% of 70 =
  21. 21.1% of 250 =
  22. 22.20% of 520 =
  23. 23.50% of 830 =
  24. 24.5% of 40 =
  25. 25.5% of 480 =
  26. 26.10% of 30 =
  27. 27.20% of 750 =
  28. 28.20% of 840 =
  29. 29.25% of 590 =
  30. 30.10% of 900 =
  31. 31.1% of 240 =
  32. 32.1% of 820 =
  33. 33.5% of 150 =
  34. 34.50% of 210 =
  35. 35.5% of 270 =
  36. 36.20% of 840 =
  37. 37.15% of 710 =
  38. 38.50% of 470 =
  39. 39.25% of 100 =
  40. 40.50% of 840 =

Answer key

  1. 32
  2. 30
  3. 114
  4. 17
  5. 30
  6. 152
  7. 78
  8. 34
  9. 34
  10. 45
  11. 76.5
  12. 415
  13. 19
  14. 77.5
  15. 26
  16. 110
  17. 42.5
  18. 136
  19. 60
  20. 7
  21. 2.5
  22. 104
  23. 415
  24. 2
  25. 24
  26. 3
  27. 150
  28. 168
  29. 147.5
  30. 90
  31. 2.4
  32. 8.2
  33. 7.5
  34. 105
  35. 13.5
  36. 168
  37. 106.5
  38. 235
  39. 25
  40. 420

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