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Subtract 35/45 from 15/42

15/42 - 35/45 is -53/126.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 45 is 630
  2. For the 1st fraction, since 42 × 15 = 630,
    15/42 = 15 × 15/42 × 15 = 225/630
  3. Likewise, for the 2nd fraction, since 45 × 14 = 630,
    35/45 = 35 × 14/45 × 14 = 490/630
  4. Subtract the two fractions:
    225/630 - 490/630 = 225 - 490/630 = -265/630
  5. After reducing the fraction, the answer is -53/126

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