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Subtract 9/32 from 5/21

5/21 - 9/32 is -29/672.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 32 is 672

    Next, find the equivalent fraction of both fractional numbers with denominator 672
  2. For the 1st fraction, since 21 × 32 = 672,
    5/21 = 5 × 32/21 × 32 = 160/672
  3. Likewise, for the 2nd fraction, since 32 × 21 = 672,
    9/32 = 9 × 21/32 × 21 = 189/672
  4. Subtract the two like fractions:
    160/672 - 189/672 = 160 - 189/672 = -29/672

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