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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 944 · 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. 1.20% of 790 =
  2. 2.25% of 620 =
  3. 3.1% of 280 =
  4. 4.5% of 400 =
  5. 5.1% of 40 =
  6. 6.15% of 290 =
  7. 7.20% of 200 =
  8. 8.1% of 40 =
  9. 9.10% of 280 =
  10. 10.5% of 520 =
  11. 11.50% of 120 =
  12. 12.1% of 520 =
  13. 13.25% of 570 =
  14. 14.15% of 550 =
  15. 15.25% of 320 =
  16. 16.15% of 850 =
  17. 17.15% of 240 =
  18. 18.20% of 410 =
  19. 19.1% of 770 =
  20. 20.10% of 830 =
  21. 21.25% of 90 =
  22. 22.10% of 210 =
  23. 23.10% of 430 =
  24. 24.25% of 370 =
  25. 25.20% of 540 =
  26. 26.5% of 810 =
  27. 27.25% of 600 =
  28. 28.15% of 420 =
  29. 29.20% of 750 =
  30. 30.15% of 740 =
  31. 31.50% of 540 =
  32. 32.20% of 490 =
  33. 33.20% of 660 =
  34. 34.15% of 180 =
  35. 35.10% of 380 =
  36. 36.5% of 230 =
  37. 37.20% of 160 =
  38. 38.20% of 820 =
  39. 39.25% of 850 =
  40. 40.10% of 360 =

Answer key

  1. 158
  2. 155
  3. 2.8
  4. 20
  5. 0.4
  6. 43.5
  7. 40
  8. 0.4
  9. 28
  10. 26
  11. 60
  12. 5.2
  13. 142.5
  14. 82.5
  15. 80
  16. 127.5
  17. 36
  18. 82
  19. 7.7
  20. 83
  21. 22.5
  22. 21
  23. 43
  24. 92.5
  25. 108
  26. 40.5
  27. 150
  28. 63
  29. 150
  30. 111
  31. 270
  32. 98
  33. 132
  34. 27
  35. 38
  36. 11.5
  37. 32
  38. 164
  39. 212.5
  40. 36

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