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Subtract 3/9 from 21/18

1st number: 1 3/18, 2nd number: 3/9

21/18 - 3/9 is 5/6.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 9 is 18

    Next, find the equivalent fraction of both fractional numbers with denominator 18
  2. For the 1st fraction, since 18 × 1 = 18,
    21/18 = 21 × 1/18 × 1 = 21/18
  3. Likewise, for the 2nd fraction, since 9 × 2 = 18,
    3/9 = 3 × 2/9 × 2 = 6/18
  4. Subtract the two like fractions:
    21/18 - 6/18 = 21 - 6/18 = 15/18
  5. After reducing the fraction, the answer is 5/6

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