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Subtract 20/9 from 1/7

1st number: 1/7, 2nd number: 2 2/9

1/7 - 20/9 is -131/63.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 9 is 63
  2. For the 1st fraction, since 7 × 9 = 63,
    1/7 = 1 × 9/7 × 9 = 9/63
  3. Likewise, for the 2nd fraction, since 9 × 7 = 63,
    20/9 = 20 × 7/9 × 7 = 140/63
  4. Subtract the two fractions:
    9/63 - 140/63 = 9 - 140/63 = -131/63

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