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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 837 · 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. 1.1% of 80 =
  2. 2.15% of 830 =
  3. 3.1% of 240 =
  4. 4.15% of 270 =
  5. 5.1% of 530 =
  6. 6.20% of 210 =
  7. 7.50% of 350 =
  8. 8.15% of 450 =
  9. 9.50% of 660 =
  10. 10.10% of 100 =
  11. 11.20% of 750 =
  12. 12.10% of 420 =
  13. 13.5% of 670 =
  14. 14.1% of 380 =
  15. 15.50% of 300 =
  16. 16.15% of 160 =
  17. 17.20% of 420 =
  18. 18.20% of 320 =
  19. 19.1% of 650 =
  20. 20.50% of 80 =
  21. 21.25% of 890 =
  22. 22.1% of 530 =
  23. 23.20% of 660 =
  24. 24.10% of 320 =
  25. 25.25% of 420 =
  26. 26.10% of 160 =
  27. 27.20% of 600 =
  28. 28.20% of 540 =
  29. 29.1% of 90 =
  30. 30.20% of 390 =
  31. 31.15% of 590 =
  32. 32.50% of 700 =
  33. 33.10% of 780 =
  34. 34.10% of 90 =
  35. 35.5% of 670 =
  36. 36.15% of 130 =
  37. 37.50% of 120 =
  38. 38.1% of 490 =
  39. 39.25% of 170 =
  40. 40.1% of 140 =

Answer key

  1. 0.8
  2. 124.5
  3. 2.4
  4. 40.5
  5. 5.3
  6. 42
  7. 175
  8. 67.5
  9. 330
  10. 10
  11. 150
  12. 42
  13. 33.5
  14. 3.8
  15. 150
  16. 24
  17. 84
  18. 64
  19. 6.5
  20. 40
  21. 222.5
  22. 5.3
  23. 132
  24. 32
  25. 105
  26. 16
  27. 120
  28. 108
  29. 0.9
  30. 78
  31. 88.5
  32. 350
  33. 78
  34. 9
  35. 33.5
  36. 19.5
  37. 60
  38. 4.9
  39. 42.5
  40. 1.4

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