Subtract 3/18 from 81/14
1st number: 5 11/14, 2nd number: 3/18
81/14 - 3/18 is 118/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 14 × 9 = 126,
81/14 = 81 × 9/14 × 9 = 729/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
3/18 = 3 × 7/18 × 7 = 21/126 - Subtract the two like fractions:
729/126 - 21/126 = 729 - 21/126 = 708/126 - After reducing the fraction, the answer is 118/21
- In mixed form: 513/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/14-6/18 81/28-3/18 81/14-3/36 81/14-9/18 81/42-3/18 81/14-3/54 81/14-15/18 81/70-3/18 81/14-3/90 81/14-21/18 81/98-3/18