Subtract 6/80 from 90/98, Solve 90/98

Subtract 6/80 from 90/98

90/98 - 6/80 is 1653/1960.

Find the least common denominator or LCM of the two denominators:
LCM of 98 and 80 is 3920

Next, find the equivalent fraction of both fractional numbers with denominator 3920
For the 1st fraction, since 98 × 40 = 3920,
90/98 = 90 × 40/98 × 40 = 3600/3920
Likewise, for the 2nd fraction, since 80 × 49 = 3920,
6/80 = 6 × 49/80 × 49 = 294/3920
Subtract the two like fractions:
3600/3920 - 294/3920 = 3600 - 294/3920 = 3306/3920
After reducing the fraction, the answer is 1653/1960

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