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Subtract 63/70 from 27/80

27/80 - 63/70 is -9/16.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 70 is 560
  2. For the 1st fraction, since 80 × 7 = 560,
    27/80 = 27 × 7/80 × 7 = 189/560
  3. Likewise, for the 2nd fraction, since 70 × 8 = 560,
    63/70 = 63 × 8/70 × 8 = 504/560
  4. Subtract the two fractions:
    189/560 - 504/560 = 189 - 504/560 = -315/560
  5. After reducing the fraction, the answer is -9/16

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