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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 923 · 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. 1.25% of 630 =
  2. 2.1% of 140 =
  3. 3.5% of 520 =
  4. 4.10% of 190 =
  5. 5.5% of 720 =
  6. 6.15% of 290 =
  7. 7.5% of 220 =
  8. 8.15% of 150 =
  9. 9.20% of 280 =
  10. 10.20% of 430 =
  11. 11.50% of 280 =
  12. 12.25% of 270 =
  13. 13.5% of 80 =
  14. 14.15% of 20 =
  15. 15.10% of 710 =
  16. 16.20% of 380 =
  17. 17.25% of 130 =
  18. 18.20% of 230 =
  19. 19.1% of 590 =
  20. 20.10% of 330 =
  21. 21.10% of 510 =
  22. 22.20% of 620 =
  23. 23.25% of 60 =
  24. 24.20% of 620 =
  25. 25.15% of 240 =
  26. 26.25% of 20 =
  27. 27.5% of 180 =
  28. 28.15% of 460 =
  29. 29.15% of 620 =
  30. 30.50% of 270 =
  31. 31.10% of 500 =
  32. 32.50% of 750 =
  33. 33.1% of 410 =
  34. 34.5% of 60 =
  35. 35.10% of 580 =
  36. 36.20% of 640 =
  37. 37.10% of 230 =
  38. 38.10% of 680 =
  39. 39.10% of 50 =
  40. 40.5% of 350 =

Answer key

  1. 157.5
  2. 1.4
  3. 26
  4. 19
  5. 36
  6. 43.5
  7. 11
  8. 22.5
  9. 56
  10. 86
  11. 140
  12. 67.5
  13. 4
  14. 3
  15. 71
  16. 76
  17. 32.5
  18. 46
  19. 5.9
  20. 33
  21. 51
  22. 124
  23. 15
  24. 124
  25. 36
  26. 5
  27. 9
  28. 69
  29. 93
  30. 135
  31. 50
  32. 375
  33. 4.1
  34. 3
  35. 58
  36. 128
  37. 23
  38. 68
  39. 5
  40. 17.5

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