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Subtract 7/8 from 3/10

3/10 - 7/8 is -23/40.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 8 is 40
  2. For the 1st fraction, since 10 × 4 = 40,
    3/10 = 3 × 4/10 × 4 = 12/40
  3. Likewise, for the 2nd fraction, since 8 × 5 = 40,
    7/8 = 7 × 5/8 × 5 = 35/40
  4. Subtract the two fractions:
    12/40 - 35/40 = 12 - 35/40 = -23/40

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