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Subtract 7/9 from 1/20

1/20 - 7/9 is -131/180.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 9 is 180
  2. For the 1st fraction, since 20 × 9 = 180,
    1/20 = 1 × 9/20 × 9 = 9/180
  3. Likewise, for the 2nd fraction, since 9 × 20 = 180,
    7/9 = 7 × 20/9 × 20 = 140/180
  4. Subtract the two fractions:
    9/180 - 140/180 = 9 - 140/180 = -131/180

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