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Subtract 42/45 from 90/60

1st number: 1 30/60, 2nd number: 42/45

90/60 - 42/45 is 17/30.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 60 and 45 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 60 × 3 = 180,
    90/60 = 90 × 3/60 × 3 = 270/180
  3. Likewise, for the 2nd fraction, since 45 × 4 = 180,
    42/45 = 42 × 4/45 × 4 = 168/180
  4. Subtract the two like fractions:
    270/180 - 168/180 = 270 - 168/180 = 102/180
  5. After reducing the fraction, the answer is 17/30

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