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Subtract 70/84 from 28/72

28/72 - 70/84 is -4/9.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 84 is 504
  2. For the 1st fraction, since 72 × 7 = 504,
    28/72 = 28 × 7/72 × 7 = 196/504
  3. Likewise, for the 2nd fraction, since 84 × 6 = 504,
    70/84 = 70 × 6/84 × 6 = 420/504
  4. Subtract the two fractions:
    196/504 - 420/504 = 196 - 420/504 = -224/504
  5. After reducing the fraction, the answer is -4/9

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