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Subtract 20/7 from 15/28

1st number: 15/28, 2nd number: 2 6/7

15/28 - 20/7 is -65/28.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 7 is 28
  2. For the 1st fraction, since 28 × 1 = 28,
    15/28 = 15 × 1/28 × 1 = 15/28
  3. Likewise, for the 2nd fraction, since 7 × 4 = 28,
    20/7 = 20 × 4/7 × 4 = 80/28
  4. Subtract the two fractions:
    15/28 - 80/28 = 15 - 80/28 = -65/28

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