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Subtract 14/80 from 7/90

7/90 - 14/80 is -7/72.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 80 is 720

    Next, find the equivalent fraction of both fractional numbers with denominator 720
  2. For the 1st fraction, since 90 × 8 = 720,
    7/90 = 7 × 8/90 × 8 = 56/720
  3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
    14/80 = 14 × 9/80 × 9 = 126/720
  4. Subtract the two like fractions:
    56/720 - 126/720 = 56 - 126/720 = -70/720
  5. After reducing the fraction, the answer is -7/72

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