Subtract 8/14 from 21/18
1st number: 1 3/18, 2nd number: 8/14
21/18 - 8/14 is 25/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 14 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
21/18 = 21 × 7/18 × 7 = 147/126 - Likewise, for the 2nd fraction, since 14 × 9 = 126,
8/14 = 8 × 9/14 × 9 = 72/126 - Subtract the two like fractions:
147/126 - 72/126 = 147 - 72/126 = 75/126 - After reducing the fraction, the answer is 25/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/18-8/14 21/18-16/14 21/36-8/14 21/18-8/28 63/18-8/14 21/18-24/14 21/54-8/14 21/18-8/42 21/18-40/14 21/90-8/14 21/18-8/70 21/18-56/14 21/18-8/98