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Subtract 21/6 from 56/15

1st number: 3 11/15, 2nd number: 3 3/6

56/15 - 21/6 is 7/30.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 6 is 30

    Next, find the equivalent fraction of both fractional numbers with denominator 30
  2. For the 1st fraction, since 15 × 2 = 30,
    56/15 = 56 × 2/15 × 2 = 112/30
  3. Likewise, for the 2nd fraction, since 6 × 5 = 30,
    21/6 = 21 × 5/6 × 5 = 105/30
  4. Subtract the two like fractions:
    112/30 - 105/30 = 112 - 105/30 = 7/30

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