Subtract 12/5 from 20/98, Solve 20/98

Subtract 12/5 from 20/98

1^st number: 20/98, 2^nd number: 2 2/5

20/98 - 12/5 is -538/245.

Find the least common denominator or LCM of the two denominators:
LCM of 98 and 5 is 490

Next, find the equivalent fraction of both fractional numbers with denominator 490
For the 1st fraction, since 98 × 5 = 490,
20/98 = 20 × 5/98 × 5 = 100/490
Likewise, for the 2nd fraction, since 5 × 98 = 490,
12/5 = 12 × 98/5 × 98 = 1176/490
Subtract the two like fractions:
100/490 - 1176/490 = 100 - 1176/490 = -1076/490
After reducing the fraction, the answer is -538/245

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