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Subtract 5/18 from 7/45

7/45 - 5/18 is -11/90.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 18 is 90
  2. For the 1st fraction, since 45 × 2 = 90,
    7/45 = 7 × 2/45 × 2 = 14/90
  3. Likewise, for the 2nd fraction, since 18 × 5 = 90,
    5/18 = 5 × 5/18 × 5 = 25/90
  4. Subtract the two fractions:
    14/90 - 25/90 = 14 - 25/90 = -11/90

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