Subtract 30/90 from 7/98, Solve 7/98

Subtract 30/90 from 7/98

7/98 - 30/90 is -11/42.

Find the least common denominator or LCM of the two denominators:
LCM of 98 and 90 is 4410

Next, find the equivalent fraction of both fractional numbers with denominator 4410
For the 1st fraction, since 98 × 45 = 4410,
7/98 = 7 × 45/98 × 45 = 315/4410
Likewise, for the 2nd fraction, since 90 × 49 = 4410,
30/90 = 30 × 49/90 × 49 = 1470/4410
Subtract the two like fractions:
315/4410 - 1470/4410 = 315 - 1470/4410 = -1155/4410
After reducing the fraction, the answer is -11/42

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