Subtract 28/20 from 7/14
1st number: 7/14, 2nd number: 1 8/20
7/14 - 28/20 is -9/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 14 × 10 = 140,
7/14 = 7 × 10/14 × 10 = 70/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
28/20 = 28 × 7/20 × 7 = 196/140 - Subtract the two like fractions:
70/140 - 196/140 = 70 - 196/140 = -126/140 - After reducing the fraction, the answer is -9/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 7/14-56/20 7/28-28/20 7/14-28/40 21/14-28/20 7/14-84/20 7/42-28/20 7/14-28/60 35/14-28/20 7/70-28/20 49/14-28/20 7/98-28/20