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Subtract 21/54 from 5/7

5/7 - 21/54 is 41/126.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 54 is 378

    Next, find the equivalent fraction of both fractional numbers with denominator 378
  2. For the 1st fraction, since 7 × 54 = 378,
    5/7 = 5 × 54/7 × 54 = 270/378
  3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
    21/54 = 21 × 7/54 × 7 = 147/378
  4. Subtract the two like fractions:
    270/378 - 147/378 = 270 - 147/378 = 123/378
  5. After reducing the fraction, the answer is 41/126

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