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Subtract 80/42 from 50/45

1st number: 1 5/45, 2nd number: 1 38/42

50/45 - 80/42 is -50/63.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 42 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 45 × 14 = 630,
    50/45 = 50 × 14/45 × 14 = 700/630
  3. Likewise, for the 2nd fraction, since 42 × 15 = 630,
    80/42 = 80 × 15/42 × 15 = 1200/630
  4. Subtract the two like fractions:
    700/630 - 1200/630 = 700 - 1200/630 = -500/630
  5. After reducing the fraction, the answer is -50/63

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