Subtract 21/81 from 7/48, Solve 7/48

Subtract 21/81 from 7/48

7/48 - 21/81 is -49/432.

Find the least common denominator or LCM of the two denominators:
LCM of 48 and 81 is 1296

Next, find the equivalent fraction of both fractional numbers with denominator 1296
For the 1st fraction, since 48 × 27 = 1296,
7/48 = 7 × 27/48 × 27 = 189/1296
Likewise, for the 2nd fraction, since 81 × 16 = 1296,
21/81 = 21 × 16/81 × 16 = 336/1296
Subtract the two like fractions:
189/1296 - 336/1296 = 189 - 336/1296 = -147/1296
After reducing the fraction, the answer is -49/432

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