Subtract 16/18 from 5/7
5/7 - 16/18 is -11/63.
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,
5/7 = 5 × 18/7 × 18 = 90/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
16/18 = 16 × 7/18 × 7 = 112/126 - Subtract the two like fractions:
90/126 - 112/126 = 90 - 112/126 = -22/126 - After reducing the fraction, the answer is -11/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/7-16/18 5/7-32/18 5/14-16/18 5/7-16/36 15/7-16/18 5/7-48/18 5/21-16/18 5/7-16/54 25/7-16/18 5/7-80/18 5/35-16/18 5/7-16/90 35/7-16/18 5/49-16/18