Subtract 12/9 from 15/28
1st number: 15/28, 2nd number: 1 3/9
15/28 - 12/9 is -67/84.
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,
15/28 = 15 × 9/28 × 9 = 135/252 - Likewise, for the 2nd fraction, since 9 × 28 = 252,
12/9 = 12 × 28/9 × 28 = 336/252 - Subtract the two like fractions:
135/252 - 336/252 = 135 - 336/252 = -201/252 - After reducing the fraction, the answer is -67/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/28-12/9 15/28-24/9 15/56-12/9 15/28-12/18 45/28-12/9 15/28-36/9 15/84-12/9 15/28-12/27 75/28-12/9 15/28-60/9 15/28-12/45 15/28-84/9 15/28-12/63