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Subtract 9/7 from 18/30

1st number: 18/30, 2nd number: 1 2/7

18/30 - 9/7 is -24/35.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 7 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 30 × 7 = 210,
    18/30 = 18 × 7/30 × 7 = 126/210
  3. Likewise, for the 2nd fraction, since 7 × 30 = 210,
    9/7 = 9 × 30/7 × 30 = 270/210
  4. Subtract the two like fractions:
    126/210 - 270/210 = 126 - 270/210 = -144/210
  5. After reducing the fraction, the answer is -24/35

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