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Subtract 48/42 from 21/12

1st number: 1 9/12, 2nd number: 1 6/42

21/12 - 48/42 is 17/28.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 42 is 84
  2. For the 1st fraction, since 12 × 7 = 84,
    21/12 = 21 × 7/12 × 7 = 147/84
  3. Likewise, for the 2nd fraction, since 42 × 2 = 84,
    48/42 = 48 × 2/42 × 2 = 96/84
  4. Subtract the two fractions:
    147/84 - 96/84 = 147 - 96/84 = 51/84
  5. After reducing the fraction, the answer is 17/28

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