Subtract 21/27 from 15/98, Solve 15/98

Subtract 21/27 from 15/98

15/98 - 21/27 is -551/882.

Find the least common denominator or LCM of the two denominators:
LCM of 98 and 27 is 2646

Next, find the equivalent fraction of both fractional numbers with denominator 2646
For the 1st fraction, since 98 × 27 = 2646,
15/98 = 15 × 27/98 × 27 = 405/2646
Likewise, for the 2nd fraction, since 27 × 98 = 2646,
21/27 = 21 × 98/27 × 98 = 2058/2646
Subtract the two like fractions:
405/2646 - 2058/2646 = 405 - 2058/2646 = -1653/2646
After reducing the fraction, the answer is -551/882

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