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Subtract 7/9 from 15/30

15/30 - 7/9 is -5/18.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 9 is 90
  2. For the 1st fraction, since 30 × 3 = 90,
    15/30 = 15 × 3/30 × 3 = 45/90
  3. Likewise, for the 2nd fraction, since 9 × 10 = 90,
    7/9 = 7 × 10/9 × 10 = 70/90
  4. Subtract the two fractions:
    45/90 - 70/90 = 45 - 70/90 = -25/90
  5. After reducing the fraction, the answer is -5/18

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