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Subtract 7/81 from 2/28

2/28 - 7/81 is -17/1134.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 81 is 2268

    Next, find the equivalent fraction of both fractional numbers with denominator 2268
  2. For the 1st fraction, since 28 × 81 = 2268,
    2/28 = 2 × 81/28 × 81 = 162/2268
  3. Likewise, for the 2nd fraction, since 81 × 28 = 2268,
    7/81 = 7 × 28/81 × 28 = 196/2268
  4. Subtract the two like fractions:
    162/2268 - 196/2268 = 162 - 196/2268 = -34/2268
  5. After reducing the fraction, the answer is -17/1134

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