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Subtract 21/64 from 1/28

1/28 - 21/64 is -131/448.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 64 is 448

    Next, find the equivalent fraction of both fractional numbers with denominator 448
  2. For the 1st fraction, since 28 × 16 = 448,
    1/28 = 1 × 16/28 × 16 = 16/448
  3. Likewise, for the 2nd fraction, since 64 × 7 = 448,
    21/64 = 21 × 7/64 × 7 = 147/448
  4. Subtract the two like fractions:
    16/448 - 147/448 = 16 - 147/448 = -131/448

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