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Subtract 40/7 from 90/84

1st number: 1 6/84, 2nd number: 5 5/7

90/84 - 40/7 is -65/14.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 7 is 84
  2. For the 1st fraction, since 84 × 1 = 84,
    90/84 = 90 × 1/84 × 1 = 90/84
  3. Likewise, for the 2nd fraction, since 7 × 12 = 84,
    40/7 = 40 × 12/7 × 12 = 480/84
  4. Subtract the two fractions:
    90/84 - 480/84 = 90 - 480/84 = -390/84
  5. After reducing the fraction, the answer is -65/14

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