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Subtract 21/8 from 14/9

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

14/9 - 21/8 is -77/72.

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,
    14/9 = 14 × 8/9 × 8 = 112/72
  3. Likewise, for the 2nd fraction, since 8 × 9 = 72,
    21/8 = 21 × 9/8 × 9 = 189/72
  4. Subtract the two like fractions:
    112/72 - 189/72 = 112 - 189/72 = -77/72

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