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Subtract 7/10 from 3/9

3/9 - 7/10 is -11/30.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 9 and 10 is 90

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 9 × 10 = 90,
    3/9 = 3 × 10/9 × 10 = 30/90
  3. Likewise, for the 2nd fraction, since 10 × 9 = 90,
    7/10 = 7 × 9/10 × 9 = 63/90
  4. Subtract the two like fractions:
    30/90 - 63/90 = 30 - 63/90 = -33/90
  5. After reducing the fraction, the answer is -11/30

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