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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 886 · 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 660 =
  2. 2.50% of 120 =
  3. 3.50% of 820 =
  4. 4.20% of 320 =
  5. 5.5% of 140 =
  6. 6.25% of 370 =
  7. 7.50% of 300 =
  8. 8.50% of 530 =
  9. 9.10% of 100 =
  10. 10.10% of 460 =
  11. 11.10% of 160 =
  12. 12.50% of 210 =
  13. 13.1% of 310 =
  14. 14.25% of 600 =
  15. 15.50% of 240 =
  16. 16.5% of 70 =
  17. 17.1% of 20 =
  18. 18.15% of 660 =
  19. 19.5% of 620 =
  20. 20.1% of 530 =
  21. 21.1% of 460 =
  22. 22.1% of 710 =
  23. 23.5% of 70 =
  24. 24.25% of 760 =
  25. 25.5% of 220 =
  26. 26.25% of 820 =
  27. 27.10% of 130 =
  28. 28.15% of 210 =
  29. 29.15% of 600 =
  30. 30.10% of 830 =
  31. 31.10% of 170 =
  32. 32.10% of 460 =
  33. 33.15% of 610 =
  34. 34.25% of 400 =
  35. 35.20% of 510 =
  36. 36.1% of 80 =
  37. 37.5% of 800 =
  38. 38.10% of 260 =
  39. 39.15% of 150 =
  40. 40.10% of 460 =

Answer key

  1. 132
  2. 60
  3. 410
  4. 64
  5. 7
  6. 92.5
  7. 150
  8. 265
  9. 10
  10. 46
  11. 16
  12. 105
  13. 3.1
  14. 150
  15. 120
  16. 3.5
  17. 0.2
  18. 99
  19. 31
  20. 5.3
  21. 4.6
  22. 7.1
  23. 3.5
  24. 190
  25. 11
  26. 205
  27. 13
  28. 31.5
  29. 90
  30. 83
  31. 17
  32. 46
  33. 91.5
  34. 100
  35. 102
  36. 0.8
  37. 40
  38. 26
  39. 22.5
  40. 46

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