Subtract 80/49 from 28/20
1st number: 1 8/20, 2nd number: 1 31/49
28/20 - 80/49 is -57/245.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 49 is 980
Next, find the equivalent fraction of both fractional numbers with denominator 980 - For the 1st fraction, since 20 × 49 = 980,
28/20 = 28 × 49/20 × 49 = 1372/980 - Likewise, for the 2nd fraction, since 49 × 20 = 980,
80/49 = 80 × 20/49 × 20 = 1600/980 - Subtract the two like fractions:
1372/980 - 1600/980 = 1372 - 1600/980 = -228/980 - After reducing the fraction, the answer is -57/245
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/20-80/49 28/40-80/49 28/20-80/98 84/20-80/49 28/60-80/49