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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 940 · 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. 1.20% of 110 =
  2. 2.20% of 760 =
  3. 3.10% of 30 =
  4. 4.20% of 560 =
  5. 5.5% of 180 =
  6. 6.1% of 40 =
  7. 7.15% of 530 =
  8. 8.5% of 890 =
  9. 9.25% of 70 =
  10. 10.15% of 830 =
  11. 11.10% of 240 =
  12. 12.5% of 660 =
  13. 13.25% of 730 =
  14. 14.1% of 530 =
  15. 15.25% of 890 =
  16. 16.10% of 300 =
  17. 17.15% of 820 =
  18. 18.10% of 540 =
  19. 19.25% of 500 =
  20. 20.20% of 150 =
  21. 21.5% of 810 =
  22. 22.1% of 680 =
  23. 23.10% of 160 =
  24. 24.10% of 790 =
  25. 25.10% of 260 =
  26. 26.5% of 40 =
  27. 27.50% of 170 =
  28. 28.20% of 520 =
  29. 29.50% of 520 =
  30. 30.5% of 690 =
  31. 31.15% of 50 =
  32. 32.1% of 880 =
  33. 33.50% of 700 =
  34. 34.5% of 410 =
  35. 35.15% of 570 =
  36. 36.5% of 420 =
  37. 37.20% of 830 =
  38. 38.20% of 570 =
  39. 39.1% of 690 =
  40. 40.5% of 850 =

Answer key

  1. 22
  2. 152
  3. 3
  4. 112
  5. 9
  6. 0.4
  7. 79.5
  8. 44.5
  9. 17.5
  10. 124.5
  11. 24
  12. 33
  13. 182.5
  14. 5.3
  15. 222.5
  16. 30
  17. 123
  18. 54
  19. 125
  20. 30
  21. 40.5
  22. 6.8
  23. 16
  24. 79
  25. 26
  26. 2
  27. 85
  28. 104
  29. 260
  30. 34.5
  31. 7.5
  32. 8.8
  33. 350
  34. 20.5
  35. 85.5
  36. 21
  37. 166
  38. 114
  39. 6.9
  40. 42.5

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