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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 906 · 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. 1.50% of 40 =
  2. 2.50% of 660 =
  3. 3.15% of 680 =
  4. 4.25% of 560 =
  5. 5.1% of 510 =
  6. 6.5% of 590 =
  7. 7.50% of 210 =
  8. 8.15% of 110 =
  9. 9.1% of 230 =
  10. 10.5% of 440 =
  11. 11.25% of 190 =
  12. 12.5% of 170 =
  13. 13.50% of 570 =
  14. 14.5% of 330 =
  15. 15.15% of 730 =
  16. 16.1% of 740 =
  17. 17.1% of 880 =
  18. 18.1% of 320 =
  19. 19.10% of 600 =
  20. 20.15% of 830 =
  21. 21.15% of 40 =
  22. 22.10% of 810 =
  23. 23.10% of 310 =
  24. 24.20% of 430 =
  25. 25.10% of 390 =
  26. 26.50% of 550 =
  27. 27.15% of 120 =
  28. 28.20% of 600 =
  29. 29.1% of 480 =
  30. 30.20% of 300 =
  31. 31.10% of 180 =
  32. 32.1% of 300 =
  33. 33.15% of 190 =
  34. 34.50% of 750 =
  35. 35.25% of 840 =
  36. 36.1% of 60 =
  37. 37.15% of 670 =
  38. 38.5% of 50 =
  39. 39.50% of 60 =
  40. 40.5% of 530 =

Answer key

  1. 20
  2. 330
  3. 102
  4. 140
  5. 5.1
  6. 29.5
  7. 105
  8. 16.5
  9. 2.3
  10. 22
  11. 47.5
  12. 8.5
  13. 285
  14. 16.5
  15. 109.5
  16. 7.4
  17. 8.8
  18. 3.2
  19. 60
  20. 124.5
  21. 6
  22. 81
  23. 31
  24. 86
  25. 39
  26. 275
  27. 18
  28. 120
  29. 4.8
  30. 60
  31. 18
  32. 3
  33. 28.5
  34. 375
  35. 210
  36. 0.6
  37. 100.5
  38. 2.5
  39. 30
  40. 26.5

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