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Subtract 21/8 from 2/3

1st number: 2/3, 2nd number: 2 5/8

2/3 - 21/8 is -47/24.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 3 and 8 is 24

    Next, find the equivalent fraction of both fractional numbers with denominator 24
  2. For the 1st fraction, since 3 × 8 = 24,
    2/3 = 2 × 8/3 × 8 = 16/24
  3. Likewise, for the 2nd fraction, since 8 × 3 = 24,
    21/8 = 21 × 3/8 × 3 = 63/24
  4. Subtract the two like fractions:
    16/24 - 63/24 = 16 - 63/24 = -47/24

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