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Subtract 63/4 from 21/10

1st number: 2 1/10, 2nd number: 15 3/4

21/10 - 63/4 is -273/20.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 4 is 20

    Next, find the equivalent fraction of both fractional numbers with denominator 20
  2. For the 1st fraction, since 10 × 2 = 20,
    21/10 = 21 × 2/10 × 2 = 42/20
  3. Likewise, for the 2nd fraction, since 4 × 5 = 20,
    63/4 = 63 × 5/4 × 5 = 315/20
  4. Subtract the two like fractions:
    42/20 - 315/20 = 42 - 315/20 = -273/20

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