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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 852 · 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. 1.1% of 840 =
  2. 2.20% of 570 =
  3. 3.15% of 850 =
  4. 4.5% of 570 =
  5. 5.20% of 620 =
  6. 6.5% of 370 =
  7. 7.20% of 400 =
  8. 8.15% of 520 =
  9. 9.15% of 80 =
  10. 10.50% of 640 =
  11. 11.25% of 400 =
  12. 12.1% of 510 =
  13. 13.20% of 590 =
  14. 14.50% of 390 =
  15. 15.5% of 900 =
  16. 16.1% of 740 =
  17. 17.15% of 650 =
  18. 18.1% of 610 =
  19. 19.20% of 280 =
  20. 20.50% of 540 =
  21. 21.5% of 60 =
  22. 22.50% of 730 =
  23. 23.10% of 580 =
  24. 24.20% of 760 =
  25. 25.50% of 100 =
  26. 26.20% of 480 =
  27. 27.1% of 710 =
  28. 28.10% of 390 =
  29. 29.20% of 630 =
  30. 30.20% of 20 =
  31. 31.5% of 250 =
  32. 32.1% of 780 =
  33. 33.15% of 310 =
  34. 34.15% of 360 =
  35. 35.10% of 760 =
  36. 36.15% of 300 =
  37. 37.20% of 260 =
  38. 38.15% of 650 =
  39. 39.10% of 640 =
  40. 40.5% of 150 =

Answer key

  1. 8.4
  2. 114
  3. 127.5
  4. 28.5
  5. 124
  6. 18.5
  7. 80
  8. 78
  9. 12
  10. 320
  11. 100
  12. 5.1
  13. 118
  14. 195
  15. 45
  16. 7.4
  17. 97.5
  18. 6.1
  19. 56
  20. 270
  21. 3
  22. 365
  23. 58
  24. 152
  25. 50
  26. 96
  27. 7.1
  28. 39
  29. 126
  30. 4
  31. 12.5
  32. 7.8
  33. 46.5
  34. 54
  35. 76
  36. 45
  37. 52
  38. 97.5
  39. 64
  40. 7.5

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