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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 314 · 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. 1.20% of 310 =
  2. 2.25% of 60 =
  3. 3.15% of 290 =
  4. 4.15% of 820 =
  5. 5.50% of 800 =
  6. 6.20% of 660 =
  7. 7.20% of 390 =
  8. 8.10% of 260 =
  9. 9.25% of 480 =
  10. 10.25% of 560 =
  11. 11.5% of 340 =
  12. 12.20% of 470 =
  13. 13.50% of 630 =
  14. 14.10% of 140 =
  15. 15.15% of 450 =
  16. 16.25% of 850 =
  17. 17.5% of 610 =
  18. 18.10% of 790 =
  19. 19.50% of 480 =
  20. 20.5% of 490 =
  21. 21.20% of 900 =
  22. 22.1% of 130 =
  23. 23.10% of 320 =
  24. 24.50% of 290 =
  25. 25.1% of 720 =
  26. 26.50% of 440 =
  27. 27.15% of 210 =
  28. 28.5% of 600 =
  29. 29.25% of 710 =
  30. 30.10% of 400 =
  31. 31.1% of 430 =
  32. 32.10% of 360 =
  33. 33.5% of 610 =
  34. 34.15% of 440 =
  35. 35.5% of 390 =
  36. 36.15% of 750 =
  37. 37.10% of 30 =
  38. 38.50% of 270 =
  39. 39.50% of 310 =
  40. 40.1% of 880 =

Answer key

  1. 62
  2. 15
  3. 43.5
  4. 123
  5. 400
  6. 132
  7. 78
  8. 26
  9. 120
  10. 140
  11. 17
  12. 94
  13. 315
  14. 14
  15. 67.5
  16. 212.5
  17. 30.5
  18. 79
  19. 240
  20. 24.5
  21. 180
  22. 1.3
  23. 32
  24. 145
  25. 7.2
  26. 220
  27. 31.5
  28. 30
  29. 177.5
  30. 40
  31. 4.3
  32. 36
  33. 30.5
  34. 66
  35. 19.5
  36. 112.5
  37. 3
  38. 135
  39. 155
  40. 8.8

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