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Subtract 6/15 from 21/18

1st number: 1 3/18, 2nd number: 6/15

21/18 - 6/15 is 23/30.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 15 is 90

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 18 × 5 = 90,
    21/18 = 21 × 5/18 × 5 = 105/90
  3. Likewise, for the 2nd fraction, since 15 × 6 = 90,
    6/15 = 6 × 6/15 × 6 = 36/90
  4. Subtract the two like fractions:
    105/90 - 36/90 = 105 - 36/90 = 69/90
  5. After reducing the fraction, the answer is 23/30

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