Subtract 72/70 from 30/98, Solve 30/98

Subtract 72/70 from 30/98

1^st number: 30/98, 2^nd number: 1 2/70

30/98 - 72/70 is -177/245.

Find the least common denominator or LCM of the two denominators:
LCM of 98 and 70 is 490

Next, find the equivalent fraction of both fractional numbers with denominator 490
For the 1st fraction, since 98 × 5 = 490,
30/98 = 30 × 5/98 × 5 = 150/490
Likewise, for the 2nd fraction, since 70 × 7 = 490,
72/70 = 72 × 7/70 × 7 = 504/490
Subtract the two like fractions:
150/490 - 504/490 = 150 - 504/490 = -354/490
After reducing the fraction, the answer is -177/245

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