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Subtract 21/8 from 35/9

1st number: 3 8/9, 2nd number: 2 5/8

35/9 - 21/8 is 91/72.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 9 and 8 is 72

    Next, find the equivalent fraction of both fractional numbers with denominator 72
  2. For the 1st fraction, since 9 × 8 = 72,
    35/9 = 35 × 8/9 × 8 = 280/72
  3. Likewise, for the 2nd fraction, since 8 × 9 = 72,
    21/8 = 21 × 9/8 × 9 = 189/72
  4. Subtract the two like fractions:
    280/72 - 189/72 = 280 - 189/72 = 91/72
  5. In mixed form: 119/72

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