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Subtract 72/10 from 27/90

1st number: 27/90, 2nd number: 7 2/10

27/90 - 72/10 is -69/10.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 10 is 90
  2. For the 1st fraction, since 90 × 1 = 90,
    27/90 = 27 × 1/90 × 1 = 27/90
  3. Likewise, for the 2nd fraction, since 10 × 9 = 90,
    72/10 = 72 × 9/10 × 9 = 648/90
  4. Subtract the two fractions:
    27/90 - 648/90 = 27 - 648/90 = -621/90
  5. After reducing the fraction, the answer is -69/10

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