Subtract 4/8 from 21/98
21/98 - 4/8 is -2/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 8 is 392
Next, find the equivalent fraction of both fractional numbers with denominator 392 - For the 1st fraction, since 98 × 4 = 392,
21/98 = 21 × 4/98 × 4 = 84/392 - Likewise, for the 2nd fraction, since 8 × 49 = 392,
4/8 = 4 × 49/8 × 49 = 196/392 - Subtract the two like fractions:
84/392 - 196/392 = 84 - 196/392 = -112/392 - After reducing the fraction, the answer is -2/7
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