Subtract 1/18 from 3/7
3/7 - 1/18 is 47/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 7 × 18 = 126,
3/7 = 3 × 18/7 × 18 = 54/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
1/18 = 1 × 7/18 × 7 = 7/126 - Subtract the two like fractions:
54/126 - 7/126 = 54 - 7/126 = 47/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/7-1/18 3/7-2/18 3/14-1/18 3/7-1/36 9/7-1/18 3/7-3/18 3/21-1/18 3/7-1/54 15/7-1/18 3/7-5/18 3/35-1/18 3/7-1/90 21/7-1/18 3/7-7/18 3/49-1/18