Subtract 42/81 from 25/98
25/98 - 42/81 is -697/2646.
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,
25/98 = 25 × 81/98 × 81 = 2025/7938 - Likewise, for the 2nd fraction, since 81 × 98 = 7938,
42/81 = 42 × 98/81 × 98 = 4116/7938 - Subtract the two like fractions:
2025/7938 - 4116/7938 = 2025 - 4116/7938 = -2091/7938 - After reducing the fraction, the answer is -697/2646
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