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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 924 · 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 120 =
  2. 2.5% of 850 =
  3. 3.25% of 310 =
  4. 4.15% of 800 =
  5. 5.10% of 580 =
  6. 6.5% of 390 =
  7. 7.25% of 500 =
  8. 8.50% of 850 =
  9. 9.20% of 170 =
  10. 10.25% of 50 =
  11. 11.15% of 160 =
  12. 12.1% of 540 =
  13. 13.25% of 200 =
  14. 14.5% of 40 =
  15. 15.15% of 790 =
  16. 16.15% of 20 =
  17. 17.1% of 270 =
  18. 18.50% of 670 =
  19. 19.50% of 880 =
  20. 20.5% of 350 =
  21. 21.5% of 520 =
  22. 22.50% of 460 =
  23. 23.1% of 770 =
  24. 24.15% of 560 =
  25. 25.25% of 640 =
  26. 26.25% of 480 =
  27. 27.10% of 610 =
  28. 28.50% of 790 =
  29. 29.15% of 270 =
  30. 30.10% of 850 =
  31. 31.15% of 480 =
  32. 32.1% of 110 =
  33. 33.25% of 490 =
  34. 34.10% of 540 =
  35. 35.50% of 240 =
  36. 36.25% of 150 =
  37. 37.10% of 190 =
  38. 38.25% of 290 =
  39. 39.10% of 110 =
  40. 40.1% of 120 =

Answer key

  1. 30
  2. 42.5
  3. 77.5
  4. 120
  5. 58
  6. 19.5
  7. 125
  8. 425
  9. 34
  10. 12.5
  11. 24
  12. 5.4
  13. 50
  14. 2
  15. 118.5
  16. 3
  17. 2.7
  18. 335
  19. 440
  20. 17.5
  21. 26
  22. 230
  23. 7.7
  24. 84
  25. 160
  26. 120
  27. 61
  28. 395
  29. 40.5
  30. 85
  31. 72
  32. 1.1
  33. 122.5
  34. 54
  35. 120
  36. 37.5
  37. 19
  38. 72.5
  39. 11
  40. 1.2

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