Subtract 90/9 from 7/98, Solve 7/98

Subtract 90/9 from 7/98

1^st number: 7/98, 2^nd number: 10 0/9

7/98 - 90/9 is -139/14.

Find the least common denominator or LCM of the two denominators:
LCM of 98 and 9 is 882

Next, find the equivalent fraction of both fractional numbers with denominator 882
For the 1st fraction, since 98 × 9 = 882,
7/98 = 7 × 9/98 × 9 = 63/882
Likewise, for the 2nd fraction, since 9 × 98 = 882,
90/9 = 90 × 98/9 × 98 = 8820/882
Subtract the two like fractions:
63/882 - 8820/882 = 63 - 8820/882 = -8757/882
After reducing the fraction, the answer is -139/14

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