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Subtract 30/72 from 90/45

1st number: 2 0/45, 2nd number: 30/72

90/45 - 30/72 is 19/12.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 72 is 360
  2. For the 1st fraction, since 45 × 8 = 360,
    90/45 = 90 × 8/45 × 8 = 720/360
  3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
    30/72 = 30 × 5/72 × 5 = 150/360
  4. Subtract the two fractions:
    720/360 - 150/360 = 720 - 150/360 = 570/360
  5. After reducing the fraction, the answer is 19/12
  6. In mixed form: 17/12

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