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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 892 · 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. 1.5% of 390 =
  2. 2.1% of 580 =
  3. 3.50% of 470 =
  4. 4.50% of 680 =
  5. 5.5% of 820 =
  6. 6.10% of 560 =
  7. 7.10% of 800 =
  8. 8.50% of 360 =
  9. 9.20% of 610 =
  10. 10.15% of 680 =
  11. 11.5% of 610 =
  12. 12.15% of 100 =
  13. 13.5% of 790 =
  14. 14.1% of 170 =
  15. 15.50% of 40 =
  16. 16.5% of 290 =
  17. 17.10% of 360 =
  18. 18.20% of 850 =
  19. 19.15% of 600 =
  20. 20.50% of 870 =
  21. 21.25% of 70 =
  22. 22.25% of 310 =
  23. 23.20% of 210 =
  24. 24.25% of 20 =
  25. 25.1% of 570 =
  26. 26.50% of 160 =
  27. 27.10% of 220 =
  28. 28.10% of 600 =
  29. 29.5% of 150 =
  30. 30.5% of 680 =
  31. 31.20% of 180 =
  32. 32.20% of 150 =
  33. 33.5% of 810 =
  34. 34.10% of 60 =
  35. 35.1% of 690 =
  36. 36.10% of 820 =
  37. 37.15% of 840 =
  38. 38.50% of 710 =
  39. 39.1% of 790 =
  40. 40.20% of 290 =

Answer key

  1. 19.5
  2. 5.8
  3. 235
  4. 340
  5. 41
  6. 56
  7. 80
  8. 180
  9. 122
  10. 102
  11. 30.5
  12. 15
  13. 39.5
  14. 1.7
  15. 20
  16. 14.5
  17. 36
  18. 170
  19. 90
  20. 435
  21. 17.5
  22. 77.5
  23. 42
  24. 5
  25. 5.7
  26. 80
  27. 22
  28. 60
  29. 7.5
  30. 34
  31. 36
  32. 30
  33. 40.5
  34. 6
  35. 6.9
  36. 82
  37. 126
  38. 355
  39. 7.9
  40. 58

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