Subtract 3/10 from 28/98, Solve 28/98

Subtract 3/10 from 28/98

28/98 - 3/10 is -1/70.

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,
28/98 = 28 × 5/98 × 5 = 140/490
Likewise, for the 2nd fraction, since 10 × 49 = 490,
3/10 = 3 × 49/10 × 49 = 147/490
Subtract the two like fractions:
140/490 - 147/490 = 140 - 147/490 = -7/490
After reducing the fraction, the answer is -1/70

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