Subtract 1/7 from 8/18
8/18 - 1/7 is 19/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 7 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
8/18 = 8 × 7/18 × 7 = 56/126 - Likewise, for the 2nd fraction, since 7 × 18 = 126,
1/7 = 1 × 18/7 × 18 = 18/126 - Subtract the two like fractions:
56/126 - 18/126 = 56 - 18/126 = 38/126 - After reducing the fraction, the answer is 19/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/18-1/7 8/18-2/7 8/36-1/7 8/18-1/14 24/18-1/7 8/18-3/7 8/54-1/7 8/18-1/21 40/18-1/7 8/18-5/7 8/90-1/7 8/18-1/35 56/18-1/7 8/18-1/49