Subtract 70/80 from 16/98, Solve 16/98

Subtract 70/80 from 16/98

16/98 - 70/80 is -279/392.

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,
16/98 = 16 × 40/98 × 40 = 640/3920
Likewise, for the 2nd fraction, since 80 × 49 = 3920,
70/80 = 70 × 49/80 × 49 = 3430/3920
Subtract the two like fractions:
640/3920 - 3430/3920 = 640 - 3430/3920 = -2790/3920
After reducing the fraction, the answer is -279/392

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