Subtract 7/15 from 8/28
8/28 - 7/15 is -19/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 15 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
8/28 = 8 × 15/28 × 15 = 120/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
7/15 = 7 × 28/15 × 28 = 196/420 - Subtract the two like fractions:
120/420 - 196/420 = 120 - 196/420 = -76/420 - After reducing the fraction, the answer is -19/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/28-7/15 8/28-14/15 8/56-7/15 8/28-7/30 24/28-7/15 8/28-21/15 8/84-7/15 8/28-7/45 40/28-7/15 8/28-35/15 8/28-7/75 56/28-7/15 8/28-49/15