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Subtract 35/8 from 21/10

1st number: 2 1/10, 2nd number: 4 3/8

21/10 - 35/8 is -91/40.

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,
    21/10 = 21 × 4/10 × 4 = 84/40
  3. Likewise, for the 2nd fraction, since 8 × 5 = 40,
    35/8 = 35 × 5/8 × 5 = 175/40
  4. Subtract the two like fractions:
    84/40 - 175/40 = 84 - 175/40 = -91/40

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