Subtract 42/20 from 8/49
1st number: 8/49, 2nd number: 2 2/20
8/49 - 42/20 is -949/490.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 20 is 980
Next, find the equivalent fraction of both fractional numbers with denominator 980 - For the 1st fraction, since 49 × 20 = 980,
8/49 = 8 × 20/49 × 20 = 160/980 - Likewise, for the 2nd fraction, since 20 × 49 = 980,
42/20 = 42 × 49/20 × 49 = 2058/980 - Subtract the two like fractions:
160/980 - 2058/980 = 160 - 2058/980 = -1898/980 - After reducing the fraction, the answer is -949/490
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/49-42/20 8/49-84/20 8/98-42/20 8/49-42/40 24/49-42/20 8/49-42/60 40/49-42/20 56/49-42/20