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Subtract 42/45 from 90/30

1st number: 3 0/30, 2nd number: 42/45

90/30 - 42/45 is 31/15.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 45 is 90
  2. For the 1st fraction, since 30 × 3 = 90,
    90/30 = 90 × 3/30 × 3 = 270/90
  3. Likewise, for the 2nd fraction, since 45 × 2 = 90,
    42/45 = 42 × 2/45 × 2 = 84/90
  4. Subtract the two fractions:
    270/90 - 84/90 = 270 - 84/90 = 186/90
  5. After reducing the fraction, the answer is 31/15
  6. In mixed form: 21/15

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