Subtract 72/9 from 9/28
1st number: 9/28, 2nd number: 8 0/9
9/28 - 72/9 is -215/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 9 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 28 × 9 = 252,
9/28 = 9 × 9/28 × 9 = 81/252 - Likewise, for the 2nd fraction, since 9 × 28 = 252,
72/9 = 72 × 28/9 × 28 = 2016/252 - Subtract the two like fractions:
81/252 - 2016/252 = 81 - 2016/252 = -1935/252 - After reducing the fraction, the answer is -215/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/28-72/9 9/56-72/9 9/28-72/18 27/28-72/9 9/84-72/9 9/28-72/27 45/28-72/9 9/28-72/45 63/28-72/9 9/28-72/63