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Subtract 42/90 from 5/42

5/42 - 42/90 is -73/210.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 90 is 630
  2. For the 1st fraction, since 42 × 15 = 630,
    5/42 = 5 × 15/42 × 15 = 75/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    42/90 = 42 × 7/90 × 7 = 294/630
  4. Subtract the two fractions:
    75/630 - 294/630 = 75 - 294/630 = -219/630
  5. After reducing the fraction, the answer is -73/210

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