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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 900 · 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. 1.50% of 100 =
  2. 2.10% of 160 =
  3. 3.15% of 830 =
  4. 4.50% of 850 =
  5. 5.1% of 520 =
  6. 6.50% of 290 =
  7. 7.25% of 890 =
  8. 8.5% of 190 =
  9. 9.5% of 530 =
  10. 10.10% of 710 =
  11. 11.50% of 30 =
  12. 12.25% of 850 =
  13. 13.5% of 230 =
  14. 14.1% of 90 =
  15. 15.15% of 640 =
  16. 16.10% of 430 =
  17. 17.10% of 390 =
  18. 18.10% of 740 =
  19. 19.5% of 550 =
  20. 20.25% of 60 =
  21. 21.10% of 690 =
  22. 22.15% of 270 =
  23. 23.25% of 880 =
  24. 24.15% of 100 =
  25. 25.25% of 570 =
  26. 26.15% of 50 =
  27. 27.5% of 160 =
  28. 28.20% of 510 =
  29. 29.50% of 880 =
  30. 30.50% of 80 =
  31. 31.20% of 260 =
  32. 32.25% of 820 =
  33. 33.25% of 270 =
  34. 34.5% of 180 =
  35. 35.5% of 190 =
  36. 36.10% of 40 =
  37. 37.5% of 250 =
  38. 38.50% of 550 =
  39. 39.15% of 490 =
  40. 40.50% of 70 =

Answer key

  1. 50
  2. 16
  3. 124.5
  4. 425
  5. 5.2
  6. 145
  7. 222.5
  8. 9.5
  9. 26.5
  10. 71
  11. 15
  12. 212.5
  13. 11.5
  14. 0.9
  15. 96
  16. 43
  17. 39
  18. 74
  19. 27.5
  20. 15
  21. 69
  22. 40.5
  23. 220
  24. 15
  25. 142.5
  26. 7.5
  27. 8
  28. 102
  29. 440
  30. 40
  31. 52
  32. 205
  33. 67.5
  34. 9
  35. 9.5
  36. 4
  37. 12.5
  38. 275
  39. 73.5
  40. 35

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