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Subtract 1/90 from 42/48

42/48 - 1/90 is 311/360.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 48 and 90 is 720

    Next, find the equivalent fraction of both fractional numbers with denominator 720
  2. For the 1st fraction, since 48 × 15 = 720,
    42/48 = 42 × 15/48 × 15 = 630/720
  3. Likewise, for the 2nd fraction, since 90 × 8 = 720,
    1/90 = 1 × 8/90 × 8 = 8/720
  4. Subtract the two like fractions:
    630/720 - 8/720 = 630 - 8/720 = 622/720
  5. After reducing the fraction, the answer is 311/360

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