Subtract 63/36 from 21/98, Solve 21/98

Subtract 63/36 from 21/98

1^st number: 21/98, 2^nd number: 1 27/36

21/98 - 63/36 is -43/28.

Find the least common denominator or LCM of the two denominators:
LCM of 98 and 36 is 1764

Next, find the equivalent fraction of both fractional numbers with denominator 1764
For the 1st fraction, since 98 × 18 = 1764,
21/98 = 21 × 18/98 × 18 = 378/1764
Likewise, for the 2nd fraction, since 36 × 49 = 1764,
63/36 = 63 × 49/36 × 49 = 3087/1764
Subtract the two like fractions:
378/1764 - 3087/1764 = 378 - 3087/1764 = -2709/1764
After reducing the fraction, the answer is -43/28

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