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Subtract 8/80 from 20/18

1st number: 1 2/18, 2nd number: 8/80

20/18 - 8/80 is 91/90.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 80 is 720
  2. For the 1st fraction, since 18 × 40 = 720,
    20/18 = 20 × 40/18 × 40 = 800/720
  3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
    8/80 = 8 × 9/80 × 9 = 72/720
  4. Subtract the two fractions:
    800/720 - 72/720 = 800 - 72/720 = 728/720
  5. After reducing the fraction, the answer is 91/90
  6. In mixed form: 11/90

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