Subtract 20/81 from 1/98
1/98 - 20/81 is -1879/7938.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 81 is 7938
Next, find the equivalent fraction of both fractional numbers with denominator 7938 - For the 1st fraction, since 98 × 81 = 7938,
1/98 = 1 × 81/98 × 81 = 81/7938 - Likewise, for the 2nd fraction, since 81 × 98 = 7938,
20/81 = 20 × 98/81 × 98 = 1960/7938 - Subtract the two like fractions:
81/7938 - 1960/7938 = 81 - 1960/7938 = -1879/7938
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