Subtract 2/10 from 21/98, Solve 21/98

Subtract 2/10 from 21/98

21/98 - 2/10 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,
21/98 = 21 × 5/98 × 5 = 105/490
Likewise, for the 2nd fraction, since 10 × 49 = 490,
2/10 = 2 × 49/10 × 49 = 98/490
Subtract the two like fractions:
105/490 - 98/490 = 105 - 98/490 = 7/490
After reducing the fraction, the answer is 1/70

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