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Subtract 9/80 from 5/21

5/21 - 9/80 is 211/1680.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 80 is 1680

    Next, find the equivalent fraction of both fractional numbers with denominator 1680
  2. For the 1st fraction, since 21 × 80 = 1680,
    5/21 = 5 × 80/21 × 80 = 400/1680
  3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
    9/80 = 9 × 21/80 × 21 = 189/1680
  4. Subtract the two like fractions:
    400/1680 - 189/1680 = 400 - 189/1680 = 211/1680

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