Subtract 80/9 from 28/7
1st number: 4 0/7, 2nd number: 8 8/9
28/7 - 80/9 is -44/9.
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,
28/7 = 28 × 9/7 × 9 = 252/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
80/9 = 80 × 7/9 × 7 = 560/63 - Subtract the two like fractions:
252/63 - 560/63 = 252 - 560/63 = -308/63 - After reducing the fraction, the answer is -44/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/7-80/9 28/14-80/9 28/7-80/18 84/7-80/9 28/21-80/9 28/7-80/27 28/35-80/9 28/7-80/45 28/49-80/9 28/7-80/63