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Subtract 21/36 from 30/18

1st number: 1 12/18, 2nd number: 21/36

30/18 - 21/36 is 13/12.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 36 is 36
  2. For the 1st fraction, since 18 × 2 = 36,
    30/18 = 30 × 2/18 × 2 = 60/36
  3. Likewise, for the 2nd fraction, since 36 × 1 = 36,
    21/36 = 21 × 1/36 × 1 = 21/36
  4. Subtract the two fractions:
    60/36 - 21/36 = 60 - 21/36 = 39/36
  5. After reducing the fraction, the answer is 13/12
  6. In mixed form: 11/12

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