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Subtract 64/9 from 21/4

1st number: 5 1/4, 2nd number: 7 1/9

21/4 - 64/9 is -67/36.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 9 is 36

    Next, find the equivalent fraction of both fractional numbers with denominator 36
  2. For the 1st fraction, since 4 × 9 = 36,
    21/4 = 21 × 9/4 × 9 = 189/36
  3. Likewise, for the 2nd fraction, since 9 × 4 = 36,
    64/9 = 64 × 4/9 × 4 = 256/36
  4. Subtract the two like fractions:
    189/36 - 256/36 = 189 - 256/36 = -67/36

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