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Subtract 5/18 from 21/15

1st number: 1 6/15, 2nd number: 5/18

21/15 - 5/18 is 101/90.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 18 is 90
  2. For the 1st fraction, since 15 × 6 = 90,
    21/15 = 21 × 6/15 × 6 = 126/90
  3. Likewise, for the 2nd fraction, since 18 × 5 = 90,
    5/18 = 5 × 5/18 × 5 = 25/90
  4. Subtract the two fractions:
    126/90 - 25/90 = 126 - 25/90 = 101/90
  5. In mixed form: 111/90

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