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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 912 · 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. 1.25% of 180 =
  2. 2.20% of 450 =
  3. 3.10% of 710 =
  4. 4.5% of 870 =
  5. 5.20% of 870 =
  6. 6.1% of 210 =
  7. 7.10% of 330 =
  8. 8.20% of 100 =
  9. 9.5% of 230 =
  10. 10.5% of 310 =
  11. 11.5% of 340 =
  12. 12.5% of 900 =
  13. 13.5% of 80 =
  14. 14.50% of 460 =
  15. 15.1% of 190 =
  16. 16.15% of 540 =
  17. 17.1% of 700 =
  18. 18.20% of 610 =
  19. 19.5% of 140 =
  20. 20.50% of 410 =
  21. 21.15% of 580 =
  22. 22.10% of 180 =
  23. 23.50% of 70 =
  24. 24.10% of 670 =
  25. 25.10% of 600 =
  26. 26.50% of 490 =
  27. 27.1% of 410 =
  28. 28.15% of 410 =
  29. 29.5% of 200 =
  30. 30.15% of 570 =
  31. 31.50% of 30 =
  32. 32.20% of 400 =
  33. 33.20% of 500 =
  34. 34.20% of 880 =
  35. 35.50% of 320 =
  36. 36.10% of 760 =
  37. 37.15% of 550 =
  38. 38.50% of 730 =
  39. 39.5% of 30 =
  40. 40.25% of 200 =

Answer key

  1. 45
  2. 90
  3. 71
  4. 43.5
  5. 174
  6. 2.1
  7. 33
  8. 20
  9. 11.5
  10. 15.5
  11. 17
  12. 45
  13. 4
  14. 230
  15. 1.9
  16. 81
  17. 7
  18. 122
  19. 7
  20. 205
  21. 87
  22. 18
  23. 35
  24. 67
  25. 60
  26. 245
  27. 4.1
  28. 61.5
  29. 10
  30. 85.5
  31. 15
  32. 80
  33. 100
  34. 176
  35. 160
  36. 76
  37. 82.5
  38. 365
  39. 1.5
  40. 50

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