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Subtract 9/80 from 70/90

70/90 - 9/80 is 479/720.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 80 is 720
  2. For the 1st fraction, since 90 × 8 = 720,
    70/90 = 70 × 8/90 × 8 = 560/720
  3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
    9/80 = 9 × 9/80 × 9 = 81/720
  4. Subtract the two fractions:
    560/720 - 81/720 = 560 - 81/720 = 479/720

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