Subtract 15/70 from 5/28
5/28 - 15/70 is -1/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
5/28 = 5 × 5/28 × 5 = 25/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
15/70 = 15 × 2/70 × 2 = 30/140 - Subtract the two like fractions:
25/140 - 30/140 = 25 - 30/140 = -5/140 - After reducing the fraction, the answer is -1/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/28-15/70 5/28-30/70 5/56-15/70 15/28-15/70 5/28-45/70 5/84-15/70 25/28-15/70 5/28-75/70 35/28-15/70