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Subtract 3/9 from 40/28

1st number: 1 12/28, 2nd number: 3/9

40/28 - 3/9 is 23/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 9 is 252

    Next, find the equivalent fraction of both fractional numbers with denominator 252
  2. For the 1st fraction, since 28 × 9 = 252,
    40/28 = 40 × 9/28 × 9 = 360/252
  3. Likewise, for the 2nd fraction, since 9 × 28 = 252,
    3/9 = 3 × 28/9 × 28 = 84/252
  4. Subtract the two like fractions:
    360/252 - 84/252 = 360 - 84/252 = 276/252
  5. After reducing the fraction, the answer is 23/21
  6. In mixed form: 12/21

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