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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 868 · 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 590 =
  2. 2.20% of 250 =
  3. 3.5% of 280 =
  4. 4.15% of 630 =
  5. 5.25% of 140 =
  6. 6.15% of 170 =
  7. 7.1% of 170 =
  8. 8.1% of 410 =
  9. 9.15% of 660 =
  10. 10.1% of 600 =
  11. 11.10% of 180 =
  12. 12.5% of 880 =
  13. 13.5% of 530 =
  14. 14.15% of 500 =
  15. 15.5% of 450 =
  16. 16.20% of 820 =
  17. 17.20% of 660 =
  18. 18.25% of 750 =
  19. 19.5% of 370 =
  20. 20.10% of 390 =
  21. 21.1% of 150 =
  22. 22.15% of 900 =
  23. 23.25% of 880 =
  24. 24.25% of 470 =
  25. 25.1% of 700 =
  26. 26.5% of 830 =
  27. 27.25% of 290 =
  28. 28.25% of 810 =
  29. 29.1% of 210 =
  30. 30.20% of 430 =
  31. 31.1% of 270 =
  32. 32.15% of 860 =
  33. 33.25% of 640 =
  34. 34.10% of 560 =
  35. 35.5% of 320 =
  36. 36.15% of 830 =
  37. 37.15% of 860 =
  38. 38.5% of 100 =
  39. 39.15% of 700 =
  40. 40.20% of 780 =

Answer key

  1. 29.5
  2. 50
  3. 14
  4. 94.5
  5. 35
  6. 25.5
  7. 1.7
  8. 4.1
  9. 99
  10. 6
  11. 18
  12. 44
  13. 26.5
  14. 75
  15. 22.5
  16. 164
  17. 132
  18. 187.5
  19. 18.5
  20. 39
  21. 1.5
  22. 135
  23. 220
  24. 117.5
  25. 7
  26. 41.5
  27. 72.5
  28. 202.5
  29. 2.1
  30. 86
  31. 2.7
  32. 129
  33. 160
  34. 56
  35. 16
  36. 124.5
  37. 129
  38. 5
  39. 105
  40. 156

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