Subtract 9/21 from 28/98, Solve 28/98

Subtract 9/21 from 28/98

28/98 - 9/21 is -1/7.

Find the least common denominator or LCM of the two denominators:
LCM of 98 and 21 is 294

Next, find the equivalent fraction of both fractional numbers with denominator 294
For the 1st fraction, since 98 × 3 = 294,
28/98 = 28 × 3/98 × 3 = 84/294
Likewise, for the 2nd fraction, since 21 × 14 = 294,
9/21 = 9 × 14/21 × 14 = 126/294
Subtract the two like fractions:
84/294 - 126/294 = 84 - 126/294 = -42/294
After reducing the fraction, the answer is -1/7

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