Subtract 10/45 from 21/98, Solve 21/98

Subtract 10/45 from 21/98

21/98 - 10/45 is -1/126.

Find the least common denominator or LCM of the two denominators:
LCM of 98 and 45 is 4410

Next, find the equivalent fraction of both fractional numbers with denominator 4410
For the 1st fraction, since 98 × 45 = 4410,
21/98 = 21 × 45/98 × 45 = 945/4410
Likewise, for the 2nd fraction, since 45 × 98 = 4410,
10/45 = 10 × 98/45 × 98 = 980/4410
Subtract the two like fractions:
945/4410 - 980/4410 = 945 - 980/4410 = -35/4410
After reducing the fraction, the answer is -1/126

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