Subtract 30/10 from 4/98, Solve 4/98

Subtract 30/10 from 4/98

1^st number: 4/98, 2^nd number: 3 0/10

4/98 - 30/10 is -145/49.

Find the least common denominator or LCM of the two denominators:
LCM of 98 and 10 is 490

Next, find the equivalent fraction of both fractional numbers with denominator 490
For the 1st fraction, since 98 × 5 = 490,
4/98 = 4 × 5/98 × 5 = 20/490
Likewise, for the 2nd fraction, since 10 × 49 = 490,
30/10 = 30 × 49/10 × 49 = 1470/490
Subtract the two like fractions:
20/490 - 1470/490 = 20 - 1470/490 = -1450/490
After reducing the fraction, the answer is -145/49

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