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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 830 · 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 270 =
  2. 2.10% of 110 =
  3. 3.20% of 730 =
  4. 4.15% of 120 =
  5. 5.1% of 50 =
  6. 6.25% of 220 =
  7. 7.20% of 710 =
  8. 8.15% of 100 =
  9. 9.25% of 860 =
  10. 10.5% of 760 =
  11. 11.10% of 100 =
  12. 12.20% of 590 =
  13. 13.5% of 640 =
  14. 14.5% of 270 =
  15. 15.5% of 150 =
  16. 16.5% of 210 =
  17. 17.15% of 170 =
  18. 18.10% of 210 =
  19. 19.15% of 800 =
  20. 20.20% of 440 =
  21. 21.15% of 270 =
  22. 22.50% of 100 =
  23. 23.1% of 420 =
  24. 24.5% of 710 =
  25. 25.20% of 590 =
  26. 26.5% of 800 =
  27. 27.10% of 820 =
  28. 28.15% of 350 =
  29. 29.10% of 400 =
  30. 30.10% of 190 =
  31. 31.10% of 460 =
  32. 32.10% of 900 =
  33. 33.50% of 560 =
  34. 34.5% of 630 =
  35. 35.10% of 90 =
  36. 36.50% of 260 =
  37. 37.25% of 130 =
  38. 38.20% of 790 =
  39. 39.10% of 570 =
  40. 40.15% of 40 =

Answer key

  1. 54
  2. 11
  3. 146
  4. 18
  5. 0.5
  6. 55
  7. 142
  8. 15
  9. 215
  10. 38
  11. 10
  12. 118
  13. 32
  14. 13.5
  15. 7.5
  16. 10.5
  17. 25.5
  18. 21
  19. 120
  20. 88
  21. 40.5
  22. 50
  23. 4.2
  24. 35.5
  25. 118
  26. 40
  27. 82
  28. 52.5
  29. 40
  30. 19
  31. 46
  32. 90
  33. 280
  34. 31.5
  35. 9
  36. 130
  37. 32.5
  38. 158
  39. 57
  40. 6

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