Subtract 72/9 from 28/10
1st number: 2 8/10, 2nd number: 8 0/9
28/10 - 72/9 is -26/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 9 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 10 × 9 = 90,
28/10 = 28 × 9/10 × 9 = 252/90 - Likewise, for the 2nd fraction, since 9 × 10 = 90,
72/9 = 72 × 10/9 × 10 = 720/90 - Subtract the two like fractions:
252/90 - 720/90 = 252 - 720/90 = -468/90 - After reducing the fraction, the answer is -26/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/10-72/9 28/20-72/9 28/10-72/18 84/10-72/9 28/30-72/9 28/10-72/27 28/50-72/9 28/10-72/45 28/70-72/9 28/10-72/63