Subtract 49/32 from 21/54, Solve 21/54

Subtract 49/32 from 21/54

1^st number: 21/54, 2^nd number: 1 17/32

21/54 - 49/32 is -329/288.

Find the least common denominator or LCM of the two denominators:
LCM of 54 and 32 is 864

Next, find the equivalent fraction of both fractional numbers with denominator 864
For the 1st fraction, since 54 × 16 = 864,
21/54 = 21 × 16/54 × 16 = 336/864
Likewise, for the 2nd fraction, since 32 × 27 = 864,
49/32 = 49 × 27/32 × 27 = 1323/864
Subtract the two like fractions:
336/864 - 1323/864 = 336 - 1323/864 = -987/864
After reducing the fraction, the answer is -329/288

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