Subtract 21/27 from 12/98, Solve 12/98

Subtract 21/27 from 12/98

12/98 - 21/27 is -289/441.

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,
12/98 = 12 × 27/98 × 27 = 324/2646
Likewise, for the 2nd fraction, since 27 × 98 = 2646,
21/27 = 21 × 98/27 × 98 = 2058/2646
Subtract the two like fractions:
324/2646 - 2058/2646 = 324 - 2058/2646 = -1734/2646
After reducing the fraction, the answer is -289/441

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