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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 888 · 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. 1.15% of 580 =
  2. 2.50% of 540 =
  3. 3.5% of 760 =
  4. 4.20% of 160 =
  5. 5.50% of 100 =
  6. 6.10% of 200 =
  7. 7.20% of 640 =
  8. 8.20% of 540 =
  9. 9.10% of 860 =
  10. 10.15% of 270 =
  11. 11.20% of 530 =
  12. 12.15% of 590 =
  13. 13.50% of 440 =
  14. 14.50% of 600 =
  15. 15.50% of 820 =
  16. 16.1% of 340 =
  17. 17.20% of 250 =
  18. 18.1% of 800 =
  19. 19.20% of 380 =
  20. 20.50% of 40 =
  21. 21.20% of 770 =
  22. 22.20% of 360 =
  23. 23.10% of 780 =
  24. 24.15% of 780 =
  25. 25.1% of 600 =
  26. 26.5% of 30 =
  27. 27.15% of 620 =
  28. 28.10% of 500 =
  29. 29.10% of 620 =
  30. 30.10% of 210 =
  31. 31.25% of 380 =
  32. 32.15% of 360 =
  33. 33.1% of 340 =
  34. 34.20% of 860 =
  35. 35.1% of 130 =
  36. 36.5% of 570 =
  37. 37.25% of 890 =
  38. 38.15% of 150 =
  39. 39.20% of 230 =
  40. 40.50% of 780 =

Answer key

  1. 87
  2. 270
  3. 38
  4. 32
  5. 50
  6. 20
  7. 128
  8. 108
  9. 86
  10. 40.5
  11. 106
  12. 88.5
  13. 220
  14. 300
  15. 410
  16. 3.4
  17. 50
  18. 8
  19. 76
  20. 20
  21. 154
  22. 72
  23. 78
  24. 117
  25. 6
  26. 1.5
  27. 93
  28. 50
  29. 62
  30. 21
  31. 95
  32. 54
  33. 3.4
  34. 172
  35. 1.3
  36. 28.5
  37. 222.5
  38. 22.5
  39. 46
  40. 390

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