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Subtract 1/7 from 3/72

3/72 - 1/7 is -17/168.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 7 is 504

    Next, find the equivalent fraction of both fractional numbers with denominator 504
  2. For the 1st fraction, since 72 × 7 = 504,
    3/72 = 3 × 7/72 × 7 = 21/504
  3. Likewise, for the 2nd fraction, since 7 × 72 = 504,
    1/7 = 1 × 72/7 × 72 = 72/504
  4. Subtract the two like fractions:
    21/504 - 72/504 = 21 - 72/504 = -51/504
  5. After reducing the fraction, the answer is -17/168

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