Subtract 21/36 from 3/49
3/49 - 21/36 is -307/588.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 36 is 1764
Next, find the equivalent fraction of both fractional numbers with denominator 1764 - For the 1st fraction, since 49 × 36 = 1764,
3/49 = 3 × 36/49 × 36 = 108/1764 - Likewise, for the 2nd fraction, since 36 × 49 = 1764,
21/36 = 21 × 49/36 × 49 = 1029/1764 - Subtract the two like fractions:
108/1764 - 1029/1764 = 108 - 1029/1764 = -921/1764 - After reducing the fraction, the answer is -307/588
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/49-21/36 3/49-42/36 3/98-21/36 3/49-21/72 9/49-21/36 3/49-63/36 15/49-21/36 21/49-21/36