Subtract 30/27 from 15/28
1st number: 15/28, 2nd number: 1 3/27
15/28 - 30/27 is -145/252.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 27 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 28 × 27 = 756,
15/28 = 15 × 27/28 × 27 = 405/756 - Likewise, for the 2nd fraction, since 27 × 28 = 756,
30/27 = 30 × 28/27 × 28 = 840/756 - Subtract the two like fractions:
405/756 - 840/756 = 405 - 840/756 = -435/756 - After reducing the fraction, the answer is -145/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/28-30/27 15/28-60/27 15/56-30/27 15/28-30/54 45/28-30/27 15/28-90/27 15/84-30/27 15/28-30/81 75/28-30/27