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Subtract 9/28 from 18/80

18/80 - 9/28 is -27/280.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 28 is 560

    Next, find the equivalent fraction of both fractional numbers with denominator 560
  2. For the 1st fraction, since 80 × 7 = 560,
    18/80 = 18 × 7/80 × 7 = 126/560
  3. Likewise, for the 2nd fraction, since 28 × 20 = 560,
    9/28 = 9 × 20/28 × 20 = 180/560
  4. Subtract the two like fractions:
    126/560 - 180/560 = 126 - 180/560 = -54/560
  5. After reducing the fraction, the answer is -27/280

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