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Subtract 30/42 from 30/15

1st number: 2 0/15, 2nd number: 30/42

30/15 - 30/42 is 9/7.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 42 is 210
  2. For the 1st fraction, since 15 × 14 = 210,
    30/15 = 30 × 14/15 × 14 = 420/210
  3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
    30/42 = 30 × 5/42 × 5 = 150/210
  4. Subtract the two fractions:
    420/210 - 150/210 = 420 - 150/210 = 270/210
  5. After reducing the fraction, the answer is 9/7
  6. In mixed form: 12/7

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