Subtract 2/9 from 81/7
1st number: 11 4/7, 2nd number: 2/9
81/7 - 2/9 is 715/63.
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,
2/9 = 2 × 7/9 × 7 = 14/63 - Subtract the two like fractions:
729/63 - 14/63 = 729 - 14/63 = 715/63 - In mixed form: 1122/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/7-4/9 81/14-2/9 81/7-2/18 81/7-6/9 81/21-2/9 81/7-2/27 81/7-10/9 81/35-2/9 81/7-2/45 81/7-14/9 81/49-2/9 81/7-2/63