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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 908 · 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 420 =
  2. 2.15% of 50 =
  3. 3.25% of 620 =
  4. 4.10% of 280 =
  5. 5.10% of 630 =
  6. 6.5% of 890 =
  7. 7.15% of 600 =
  8. 8.20% of 60 =
  9. 9.10% of 740 =
  10. 10.15% of 180 =
  11. 11.10% of 330 =
  12. 12.15% of 340 =
  13. 13.10% of 110 =
  14. 14.25% of 710 =
  15. 15.10% of 240 =
  16. 16.5% of 530 =
  17. 17.20% of 770 =
  18. 18.15% of 360 =
  19. 19.1% of 220 =
  20. 20.50% of 710 =
  21. 21.10% of 850 =
  22. 22.1% of 880 =
  23. 23.5% of 840 =
  24. 24.25% of 90 =
  25. 25.25% of 810 =
  26. 26.15% of 280 =
  27. 27.50% of 180 =
  28. 28.10% of 440 =
  29. 29.5% of 380 =
  30. 30.20% of 650 =
  31. 31.10% of 390 =
  32. 32.20% of 670 =
  33. 33.5% of 240 =
  34. 34.5% of 130 =
  35. 35.15% of 900 =
  36. 36.50% of 890 =
  37. 37.50% of 240 =
  38. 38.15% of 840 =
  39. 39.5% of 160 =
  40. 40.50% of 880 =

Answer key

  1. 105
  2. 7.5
  3. 155
  4. 28
  5. 63
  6. 44.5
  7. 90
  8. 12
  9. 74
  10. 27
  11. 33
  12. 51
  13. 11
  14. 177.5
  15. 24
  16. 26.5
  17. 154
  18. 54
  19. 2.2
  20. 355
  21. 85
  22. 8.8
  23. 42
  24. 22.5
  25. 202.5
  26. 42
  27. 90
  28. 44
  29. 19
  30. 130
  31. 39
  32. 134
  33. 12
  34. 6.5
  35. 135
  36. 445
  37. 120
  38. 126
  39. 8
  40. 440

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