Subtract 27/28 from 21/98
21/98 - 27/28 is -3/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 28 is 196
Next, find the equivalent fraction of both fractional numbers with denominator 196 - For the 1st fraction, since 98 × 2 = 196,
21/98 = 21 × 2/98 × 2 = 42/196 - Likewise, for the 2nd fraction, since 28 × 7 = 196,
27/28 = 27 × 7/28 × 7 = 189/196 - Subtract the two like fractions:
42/196 - 189/196 = 42 - 189/196 = -147/196 - After reducing the fraction, the answer is -3/4
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