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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 832 · 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 50 =
  2. 2.50% of 260 =
  3. 3.5% of 370 =
  4. 4.20% of 610 =
  5. 5.5% of 240 =
  6. 6.20% of 70 =
  7. 7.10% of 360 =
  8. 8.5% of 120 =
  9. 9.50% of 710 =
  10. 10.20% of 880 =
  11. 11.25% of 660 =
  12. 12.10% of 550 =
  13. 13.10% of 830 =
  14. 14.5% of 430 =
  15. 15.25% of 710 =
  16. 16.1% of 70 =
  17. 17.5% of 720 =
  18. 18.25% of 410 =
  19. 19.25% of 180 =
  20. 20.25% of 690 =
  21. 21.5% of 540 =
  22. 22.50% of 720 =
  23. 23.25% of 40 =
  24. 24.10% of 580 =
  25. 25.25% of 650 =
  26. 26.50% of 210 =
  27. 27.10% of 840 =
  28. 28.10% of 650 =
  29. 29.25% of 540 =
  30. 30.15% of 430 =
  31. 31.10% of 270 =
  32. 32.50% of 380 =
  33. 33.50% of 50 =
  34. 34.1% of 420 =
  35. 35.10% of 460 =
  36. 36.20% of 470 =
  37. 37.25% of 140 =
  38. 38.25% of 880 =
  39. 39.15% of 710 =
  40. 40.20% of 80 =

Answer key

  1. 5
  2. 130
  3. 18.5
  4. 122
  5. 12
  6. 14
  7. 36
  8. 6
  9. 355
  10. 176
  11. 165
  12. 55
  13. 83
  14. 21.5
  15. 177.5
  16. 0.7
  17. 36
  18. 102.5
  19. 45
  20. 172.5
  21. 27
  22. 360
  23. 10
  24. 58
  25. 162.5
  26. 105
  27. 84
  28. 65
  29. 135
  30. 64.5
  31. 27
  32. 190
  33. 25
  34. 4.2
  35. 46
  36. 94
  37. 35
  38. 220
  39. 106.5
  40. 16

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