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Subtract 4/9 from 25/21

1st number: 1 4/21, 2nd number: 4/9

25/21 - 4/9 is 47/63.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 9 is 63
  2. For the 1st fraction, since 21 × 3 = 63,
    25/21 = 25 × 3/21 × 3 = 75/63
  3. Likewise, for the 2nd fraction, since 9 × 7 = 63,
    4/9 = 4 × 7/9 × 7 = 28/63
  4. Subtract the two fractions:
    75/63 - 28/63 = 75 - 28/63 = 47/63

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