Subtract 80/49 from 20/36
1st number: 20/36, 2nd number: 1 31/49
20/36 - 80/49 is -475/441.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 49 is 1764
Next, find the equivalent fraction of both fractional numbers with denominator 1764 - For the 1st fraction, since 36 × 49 = 1764,
20/36 = 20 × 49/36 × 49 = 980/1764 - Likewise, for the 2nd fraction, since 49 × 36 = 1764,
80/49 = 80 × 36/49 × 36 = 2880/1764 - Subtract the two like fractions:
980/1764 - 2880/1764 = 980 - 2880/1764 = -1900/1764 - After reducing the fraction, the answer is -475/441
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/36-80/49 20/72-80/49 20/36-80/98 60/36-80/49