Subtract 27/18 from 8/7
1st number: 1 1/7, 2nd number: 1 9/18
8/7 - 27/18 is -5/14.
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,
8/7 = 8 × 18/7 × 18 = 144/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
27/18 = 27 × 7/18 × 7 = 189/126 - Subtract the two like fractions:
144/126 - 189/126 = 144 - 189/126 = -45/126 - After reducing the fraction, the answer is -5/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/7-27/18 8/7-54/18 8/14-27/18 8/7-27/36 24/7-27/18 8/7-81/18 8/21-27/18 8/7-27/54 40/7-27/18 8/35-27/18 8/7-27/90 56/7-27/18 8/49-27/18