Subtract 72/49 from 1/18
1st number: 1/18, 2nd number: 1 23/49
1/18 - 72/49 is -1247/882.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 49 is 882
Next, find the equivalent fraction of both fractional numbers with denominator 882 - For the 1st fraction, since 18 × 49 = 882,
1/18 = 1 × 49/18 × 49 = 49/882 - Likewise, for the 2nd fraction, since 49 × 18 = 882,
72/49 = 72 × 18/49 × 18 = 1296/882 - Subtract the two like fractions:
49/882 - 1296/882 = 49 - 1296/882 = -1247/882
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/18-72/49 1/36-72/49 1/18-72/98 3/18-72/49 1/54-72/49 5/18-72/49 1/90-72/49 7/18-72/49