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Subtract 1/42 from 7/45

7/45 - 1/42 is 83/630.

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,
    7/45 = 7 × 14/45 × 14 = 98/630
  3. Likewise, for the 2nd fraction, since 42 × 15 = 630,
    1/42 = 1 × 15/42 × 15 = 15/630
  4. Subtract the two like fractions:
    98/630 - 15/630 = 98 - 15/630 = 83/630

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