Subtract 15/28 from 8/15
8/15 - 15/28 is -1/420.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 28 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 15 × 28 = 420,
8/15 = 8 × 28/15 × 28 = 224/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
15/28 = 15 × 15/28 × 15 = 225/420 - Subtract the two like fractions:
224/420 - 225/420 = 224 - 225/420 = -1/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/15-15/28 8/15-30/28 8/30-15/28 8/15-15/56 24/15-15/28 8/15-45/28 8/45-15/28 8/15-15/84 40/15-15/28 8/15-75/28 8/75-15/28 56/15-15/28