Subtract 80/9 from 28/4
1st number: 7 0/4, 2nd number: 8 8/9
28/4 - 80/9 is -17/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 9 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 4 × 9 = 36,
28/4 = 28 × 9/4 × 9 = 252/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
80/9 = 80 × 4/9 × 4 = 320/36 - Subtract the two like fractions:
252/36 - 320/36 = 252 - 320/36 = -68/36 - After reducing the fraction, the answer is -17/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/4-80/9 28/8-80/9 28/4-80/18 84/4-80/9 28/12-80/9 28/4-80/27 28/20-80/9 28/4-80/45 28/4-80/63