Subtract 28/45 from 7/15
7/15 - 28/45 is -7/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 45 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 15 × 3 = 45,
7/15 = 7 × 3/15 × 3 = 21/45 - Likewise, for the 2nd fraction, since 45 × 1 = 45,
28/45 = 28 × 1/45 × 1 = 28/45 - Subtract the two like fractions:
21/45 - 28/45 = 21 - 28/45 = -7/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/15-28/45 7/15-56/45 7/30-28/45 7/15-28/90 21/15-28/45 7/15-84/45 7/45-28/45 35/15-28/45 7/75-28/45 49/15-28/45