Subtract 5/9 from 81/7
1st number: 11 4/7, 2nd number: 5/9
81/7 - 5/9 is 694/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 7 × 9 = 63,
81/7 = 81 × 9/7 × 9 = 729/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
5/9 = 5 × 7/9 × 7 = 35/63 - Subtract the two like fractions:
729/63 - 35/63 = 729 - 35/63 = 694/63 - In mixed form: 111/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/7-10/9 81/14-5/9 81/7-5/18 81/7-15/9 81/21-5/9 81/7-5/27 81/7-25/9 81/35-5/9 81/7-5/45 81/7-35/9 81/49-5/9 81/7-5/63