Subtract 15/28 from 12/27
12/27 - 15/28 is -23/252.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 28 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 27 × 28 = 756,
12/27 = 12 × 28/27 × 28 = 336/756 - Likewise, for the 2nd fraction, since 28 × 27 = 756,
15/28 = 15 × 27/28 × 27 = 405/756 - Subtract the two like fractions:
336/756 - 405/756 = 336 - 405/756 = -69/756 - After reducing the fraction, the answer is -23/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/27-15/28 12/27-30/28 12/54-15/28 12/27-15/56 36/27-15/28 12/27-45/28 12/81-15/28 12/27-15/84 60/27-15/28 12/27-75/28 84/27-15/28