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Subtract 3/80 from 9/7

1st number: 1 2/7, 2nd number: 3/80

9/7 - 3/80 is 699/560.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 80 is 560
  2. For the 1st fraction, since 7 × 80 = 560,
    9/7 = 9 × 80/7 × 80 = 720/560
  3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
    3/80 = 3 × 7/80 × 7 = 21/560
  4. Subtract the two fractions:
    720/560 - 21/560 = 720 - 21/560 = 699/560
  5. In mixed form: 1139/560

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