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Subtract 70/84 from 56/72

56/72 - 70/84 is -1/18.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 84 is 504

    Next, find the equivalent fraction of both fractional numbers with denominator 504
  2. For the 1st fraction, since 72 × 7 = 504,
    56/72 = 56 × 7/72 × 7 = 392/504
  3. Likewise, for the 2nd fraction, since 84 × 6 = 504,
    70/84 = 70 × 6/84 × 6 = 420/504
  4. Subtract the two like fractions:
    392/504 - 420/504 = 392 - 420/504 = -28/504
  5. After reducing the fraction, the answer is -1/18

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