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Subtract 9/8 from 15/30

1st number: 15/30, 2nd number: 1 1/8

15/30 - 9/8 is -5/8.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 8 is 120
  2. For the 1st fraction, since 30 × 4 = 120,
    15/30 = 15 × 4/30 × 4 = 60/120
  3. Likewise, for the 2nd fraction, since 8 × 15 = 120,
    9/8 = 9 × 15/8 × 15 = 135/120
  4. Subtract the two fractions:
    60/120 - 135/120 = 60 - 135/120 = -75/120
  5. After reducing the fraction, the answer is -5/8

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