Subtract 81/36 from 7/98, Solve 7/98

Subtract 81/36 from 7/98

1^st number: 7/98, 2^nd number: 2 9/36

7/98 - 81/36 is -61/28.

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,
7/98 = 7 × 18/98 × 18 = 126/1764
Likewise, for the 2nd fraction, since 36 × 49 = 1764,
81/36 = 81 × 49/36 × 49 = 3969/1764
Subtract the two like fractions:
126/1764 - 3969/1764 = 126 - 3969/1764 = -3843/1764
After reducing the fraction, the answer is -61/28

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