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Subtract 7/9 from 42/90

42/90 - 7/9 is -14/45.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 9 is 90

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 90 × 1 = 90,
    42/90 = 42 × 1/90 × 1 = 42/90
  3. Likewise, for the 2nd fraction, since 9 × 10 = 90,
    7/9 = 7 × 10/9 × 10 = 70/90
  4. Subtract the two like fractions:
    42/90 - 70/90 = 42 - 70/90 = -28/90
  5. After reducing the fraction, the answer is -14/45

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