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Subtract 42/30 from 4/15

1st number: 4/15, 2nd number: 1 12/30

4/15 - 42/30 is -17/15.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 30 is 30
  2. For the 1st fraction, since 15 × 2 = 30,
    4/15 = 4 × 2/15 × 2 = 8/30
  3. Likewise, for the 2nd fraction, since 30 × 1 = 30,
    42/30 = 42 × 1/30 × 1 = 42/30
  4. Subtract the two fractions:
    8/30 - 42/30 = 8 - 42/30 = -34/30
  5. After reducing the fraction, the answer is -17/15

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