Subtract 36/40 from 18/98, Solve 18/98

Subtract 36/40 from 18/98

18/98 - 36/40 is -351/490.

Find the least common denominator or LCM of the two denominators:
LCM of 98 and 40 is 1960

Next, find the equivalent fraction of both fractional numbers with denominator 1960
For the 1st fraction, since 98 × 20 = 1960,
18/98 = 18 × 20/98 × 20 = 360/1960
Likewise, for the 2nd fraction, since 40 × 49 = 1960,
36/40 = 36 × 49/40 × 49 = 1764/1960
Subtract the two like fractions:
360/1960 - 1764/1960 = 360 - 1764/1960 = -1404/1960
After reducing the fraction, the answer is -351/490

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