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Subtract 25/18 from 7/15

1st number: 7/15, 2nd number: 1 7/18

7/15 - 25/18 is -83/90.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 18 is 90
  2. For the 1st fraction, since 15 × 6 = 90,
    7/15 = 7 × 6/15 × 6 = 42/90
  3. Likewise, for the 2nd fraction, since 18 × 5 = 90,
    25/18 = 25 × 5/18 × 5 = 125/90
  4. Subtract the two fractions:
    42/90 - 125/90 = 42 - 125/90 = -83/90

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