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Subtract 9/8 from 5/90

1st number: 5/90, 2nd number: 1 1/8

5/90 - 9/8 is -77/72.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 8 is 360
  2. For the 1st fraction, since 90 × 4 = 360,
    5/90 = 5 × 4/90 × 4 = 20/360
  3. Likewise, for the 2nd fraction, since 8 × 45 = 360,
    9/8 = 9 × 45/8 × 45 = 405/360
  4. Subtract the two fractions:
    20/360 - 405/360 = 20 - 405/360 = -385/360
  5. After reducing the fraction, the answer is -77/72

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