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Subtract 63/8 from 18/10

1st number: 1 8/10, 2nd number: 7 7/8

18/10 - 63/8 is -243/40.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 8 is 40

    Next, find the equivalent fraction of both fractional numbers with denominator 40
  2. For the 1st fraction, since 10 × 4 = 40,
    18/10 = 18 × 4/10 × 4 = 72/40
  3. Likewise, for the 2nd fraction, since 8 × 5 = 40,
    63/8 = 63 × 5/8 × 5 = 315/40
  4. Subtract the two like fractions:
    72/40 - 315/40 = 72 - 315/40 = -243/40

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