Subtract 25/70 from 7/28
7/28 - 25/70 is -3/28.
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,
7/28 = 7 × 5/28 × 5 = 35/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
25/70 = 25 × 2/70 × 2 = 50/140 - Subtract the two like fractions:
35/140 - 50/140 = 35 - 50/140 = -15/140 - After reducing the fraction, the answer is -3/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/28-25/70 7/28-50/70 7/56-25/70 21/28-25/70 7/28-75/70 7/84-25/70 35/28-25/70 49/28-25/70