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Subtract 20/50 from 21/12

1st number: 1 9/12, 2nd number: 20/50

21/12 - 20/50 is 27/20.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 50 is 300

    Next, find the equivalent fraction of both fractional numbers with denominator 300
  2. For the 1st fraction, since 12 × 25 = 300,
    21/12 = 21 × 25/12 × 25 = 525/300
  3. Likewise, for the 2nd fraction, since 50 × 6 = 300,
    20/50 = 20 × 6/50 × 6 = 120/300
  4. Subtract the two like fractions:
    525/300 - 120/300 = 525 - 120/300 = 405/300
  5. After reducing the fraction, the answer is 27/20
  6. In mixed form: 17/20

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