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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 319 · 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 770 =
  2. 2.25% of 210 =
  3. 3.20% of 620 =
  4. 4.10% of 150 =
  5. 5.1% of 270 =
  6. 6.20% of 170 =
  7. 7.15% of 150 =
  8. 8.20% of 810 =
  9. 9.5% of 740 =
  10. 10.10% of 840 =
  11. 11.5% of 510 =
  12. 12.25% of 470 =
  13. 13.20% of 150 =
  14. 14.10% of 730 =
  15. 15.15% of 520 =
  16. 16.20% of 700 =
  17. 17.50% of 590 =
  18. 18.10% of 640 =
  19. 19.10% of 360 =
  20. 20.5% of 360 =
  21. 21.10% of 150 =
  22. 22.25% of 690 =
  23. 23.50% of 510 =
  24. 24.15% of 370 =
  25. 25.10% of 510 =
  26. 26.10% of 590 =
  27. 27.10% of 380 =
  28. 28.20% of 170 =
  29. 29.50% of 290 =
  30. 30.10% of 540 =
  31. 31.20% of 360 =
  32. 32.1% of 820 =
  33. 33.15% of 590 =
  34. 34.5% of 440 =
  35. 35.25% of 450 =
  36. 36.25% of 350 =
  37. 37.50% of 720 =
  38. 38.10% of 180 =
  39. 39.1% of 390 =
  40. 40.15% of 310 =

Answer key

  1. 154
  2. 52.5
  3. 124
  4. 15
  5. 2.7
  6. 34
  7. 22.5
  8. 162
  9. 37
  10. 84
  11. 25.5
  12. 117.5
  13. 30
  14. 73
  15. 78
  16. 140
  17. 295
  18. 64
  19. 36
  20. 18
  21. 15
  22. 172.5
  23. 255
  24. 55.5
  25. 51
  26. 59
  27. 38
  28. 34
  29. 145
  30. 54
  31. 72
  32. 8.2
  33. 88.5
  34. 22
  35. 112.5
  36. 87.5
  37. 360
  38. 18
  39. 3.9
  40. 46.5

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