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Subtract 90/72 from 30/45

1st number: 30/45, 2nd number: 1 18/72

30/45 - 90/72 is -7/12.

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,
    30/45 = 30 × 8/45 × 8 = 240/360
  3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
    90/72 = 90 × 5/72 × 5 = 450/360
  4. Subtract the two fractions:
    240/360 - 450/360 = 240 - 450/360 = -210/360
  5. After reducing the fraction, the answer is -7/12

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