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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 882 · 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 370 =
  2. 2.25% of 180 =
  3. 3.10% of 560 =
  4. 4.10% of 580 =
  5. 5.5% of 190 =
  6. 6.50% of 520 =
  7. 7.10% of 400 =
  8. 8.20% of 470 =
  9. 9.1% of 590 =
  10. 10.10% of 230 =
  11. 11.15% of 700 =
  12. 12.20% of 30 =
  13. 13.50% of 300 =
  14. 14.20% of 380 =
  15. 15.10% of 250 =
  16. 16.1% of 140 =
  17. 17.15% of 220 =
  18. 18.10% of 70 =
  19. 19.50% of 320 =
  20. 20.5% of 440 =
  21. 21.20% of 820 =
  22. 22.50% of 610 =
  23. 23.10% of 430 =
  24. 24.25% of 490 =
  25. 25.10% of 620 =
  26. 26.15% of 160 =
  27. 27.5% of 870 =
  28. 28.25% of 720 =
  29. 29.25% of 540 =
  30. 30.20% of 470 =
  31. 31.50% of 600 =
  32. 32.5% of 310 =
  33. 33.25% of 360 =
  34. 34.10% of 80 =
  35. 35.50% of 830 =
  36. 36.50% of 620 =
  37. 37.50% of 510 =
  38. 38.10% of 180 =
  39. 39.50% of 510 =
  40. 40.5% of 140 =

Answer key

  1. 55.5
  2. 45
  3. 56
  4. 58
  5. 9.5
  6. 260
  7. 40
  8. 94
  9. 5.9
  10. 23
  11. 105
  12. 6
  13. 150
  14. 76
  15. 25
  16. 1.4
  17. 33
  18. 7
  19. 160
  20. 22
  21. 164
  22. 305
  23. 43
  24. 122.5
  25. 62
  26. 24
  27. 43.5
  28. 180
  29. 135
  30. 94
  31. 300
  32. 15.5
  33. 90
  34. 8
  35. 415
  36. 310
  37. 255
  38. 18
  39. 255
  40. 7

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