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Subtract 4/7 from 3/18

3/18 - 4/7 is -17/42.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 7 is 126

    Next, find the equivalent fraction of both fractional numbers with denominator 126
  2. For the 1st fraction, since 18 × 7 = 126,
    3/18 = 3 × 7/18 × 7 = 21/126
  3. Likewise, for the 2nd fraction, since 7 × 18 = 126,
    4/7 = 4 × 18/7 × 18 = 72/126
  4. Subtract the two like fractions:
    21/126 - 72/126 = 21 - 72/126 = -51/126
  5. After reducing the fraction, the answer is -17/42

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