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Subtract 48/12 from 21/30

1st number: 21/30, 2nd number: 4 0/12

21/30 - 48/12 is -33/10.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 12 is 60

    Next, find the equivalent fraction of both fractional numbers with denominator 60
  2. For the 1st fraction, since 30 × 2 = 60,
    21/30 = 21 × 2/30 × 2 = 42/60
  3. Likewise, for the 2nd fraction, since 12 × 5 = 60,
    48/12 = 48 × 5/12 × 5 = 240/60
  4. Subtract the two like fractions:
    42/60 - 240/60 = 42 - 240/60 = -198/60
  5. After reducing the fraction, the answer is -33/10

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