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Subtract 16/9 from 21/16

1st number: 1 5/16, 2nd number: 1 7/9

21/16 - 16/9 is -67/144.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 16 and 9 is 144

    Next, find the equivalent fraction of both fractional numbers with denominator 144
  2. For the 1st fraction, since 16 × 9 = 144,
    21/16 = 21 × 9/16 × 9 = 189/144
  3. Likewise, for the 2nd fraction, since 9 × 16 = 144,
    16/9 = 16 × 16/9 × 16 = 256/144
  4. Subtract the two like fractions:
    189/144 - 256/144 = 189 - 256/144 = -67/144

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