Subtract 5/7 from 9/18
9/18 - 5/7 is -3/14.
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,
9/18 = 9 × 7/18 × 7 = 63/126 - Likewise, for the 2nd fraction, since 7 × 18 = 126,
5/7 = 5 × 18/7 × 18 = 90/126 - Subtract the two like fractions:
63/126 - 90/126 = 63 - 90/126 = -27/126 - After reducing the fraction, the answer is -3/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 9/18-10/7 9/36-5/7 9/18-5/14 27/18-5/7 9/18-15/7 9/54-5/7 9/18-5/21 45/18-5/7 9/18-25/7 9/90-5/7 9/18-5/35 63/18-5/7 9/18-35/7 9/18-5/49