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Subtract 40/7 from 15/4

1st number: 3 3/4, 2nd number: 5 5/7

15/4 - 40/7 is -55/28.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 7 is 28
  2. For the 1st fraction, since 4 × 7 = 28,
    15/4 = 15 × 7/4 × 7 = 105/28
  3. Likewise, for the 2nd fraction, since 7 × 4 = 28,
    40/7 = 40 × 4/7 × 4 = 160/28
  4. Subtract the two fractions:
    105/28 - 160/28 = 105 - 160/28 = -55/28

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