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Subtract 21/6 from 40/18

1st number: 2 4/18, 2nd number: 3 3/6

40/18 - 21/6 is -23/18.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 6 is 18

    Next, find the equivalent fraction of both fractional numbers with denominator 18
  2. For the 1st fraction, since 18 × 1 = 18,
    40/18 = 40 × 1/18 × 1 = 40/18
  3. Likewise, for the 2nd fraction, since 6 × 3 = 18,
    21/6 = 21 × 3/6 × 3 = 63/18
  4. Subtract the two like fractions:
    40/18 - 63/18 = 40 - 63/18 = -23/18

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