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Subtract 25/54 from 7/90

7/90 - 25/54 is -52/135.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 54 is 270

    Next, find the equivalent fraction of both fractional numbers with denominator 270
  2. For the 1st fraction, since 90 × 3 = 270,
    7/90 = 7 × 3/90 × 3 = 21/270
  3. Likewise, for the 2nd fraction, since 54 × 5 = 270,
    25/54 = 25 × 5/54 × 5 = 125/270
  4. Subtract the two like fractions:
    21/270 - 125/270 = 21 - 125/270 = -104/270
  5. After reducing the fraction, the answer is -52/135

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