Subtract 30/81 from 1/49, Solve 1/49

Subtract 30/81 from 1/49

1/49 - 30/81 is -463/1323.

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,
1/49 = 1 × 81/49 × 81 = 81/3969
Likewise, for the 2nd fraction, since 81 × 49 = 3969,
30/81 = 30 × 49/81 × 49 = 1470/3969
Subtract the two like fractions:
81/3969 - 1470/3969 = 81 - 1470/3969 = -1389/3969
After reducing the fraction, the answer is -463/1323

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