Subtract 42/81 from 8/98
8/98 - 42/81 is -578/1323.
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,
8/98 = 8 × 81/98 × 81 = 648/7938 - Likewise, for the 2nd fraction, since 81 × 98 = 7938,
42/81 = 42 × 98/81 × 98 = 4116/7938 - Subtract the two like fractions:
648/7938 - 4116/7938 = 648 - 4116/7938 = -3468/7938 - After reducing the fraction, the answer is -578/1323
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/98-42/81 8/98-84/81 24/98-42/81 40/98-42/81 56/98-42/81