Solutions by everydaycalculation.com

549 - 2181 is -2081323.

- Find the least common denominator or LCM of the two denominators:

LCM of 49 and 81 is**3969**

Next, find the equivalent fraction of both fractional numbers with denominator 3969 - For the 1st fraction, since 49 × 81 = 3969,

549 = 5 × 8149 × 81 = 4053969 - Likewise, for the 2nd fraction, since 81 × 49 = 3969,

2181 = 21 × 4981 × 49 = 10293969 - Subtract the two like fractions:

4053969 - 10293969 = 405 - 10293969 = -6243969 - After reducing the fraction, the answer is -2081323

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