Subtract 15/35 from 7/28
7/28 - 15/35 is -5/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 35 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
7/28 = 7 × 5/28 × 5 = 35/140 - Likewise, for the 2nd fraction, since 35 × 4 = 140,
15/35 = 15 × 4/35 × 4 = 60/140 - Subtract the two like fractions:
35/140 - 60/140 = 35 - 60/140 = -25/140 - After reducing the fraction, the answer is -5/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/28-15/35 7/28-30/35 7/56-15/35 7/28-15/70 21/28-15/35 7/28-45/35 7/84-15/35 35/28-15/35 7/28-75/35 49/28-15/35