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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 967 · 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 640 =
  2. 2.50% of 550 =
  3. 3.15% of 660 =
  4. 4.5% of 150 =
  5. 5.25% of 770 =
  6. 6.15% of 600 =
  7. 7.10% of 660 =
  8. 8.20% of 510 =
  9. 9.5% of 820 =
  10. 10.10% of 800 =
  11. 11.50% of 200 =
  12. 12.20% of 220 =
  13. 13.5% of 860 =
  14. 14.5% of 460 =
  15. 15.10% of 270 =
  16. 16.5% of 510 =
  17. 17.15% of 320 =
  18. 18.1% of 160 =
  19. 19.10% of 320 =
  20. 20.5% of 150 =
  21. 21.50% of 300 =
  22. 22.20% of 230 =
  23. 23.5% of 220 =
  24. 24.5% of 580 =
  25. 25.50% of 220 =
  26. 26.10% of 540 =
  27. 27.15% of 170 =
  28. 28.50% of 730 =
  29. 29.10% of 320 =
  30. 30.1% of 800 =
  31. 31.10% of 720 =
  32. 32.20% of 440 =
  33. 33.10% of 420 =
  34. 34.5% of 880 =
  35. 35.10% of 420 =
  36. 36.10% of 450 =
  37. 37.50% of 230 =
  38. 38.50% of 230 =
  39. 39.10% of 110 =
  40. 40.5% of 680 =

Answer key

  1. 96
  2. 275
  3. 99
  4. 7.5
  5. 192.5
  6. 90
  7. 66
  8. 102
  9. 41
  10. 80
  11. 100
  12. 44
  13. 43
  14. 23
  15. 27
  16. 25.5
  17. 48
  18. 1.6
  19. 32
  20. 7.5
  21. 150
  22. 46
  23. 11
  24. 29
  25. 110
  26. 54
  27. 25.5
  28. 365
  29. 32
  30. 8
  31. 72
  32. 88
  33. 42
  34. 44
  35. 42
  36. 45
  37. 115
  38. 115
  39. 11
  40. 34

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