Subtract 21/14 from 7/20
1st number: 7/20, 2nd number: 1 7/14
7/20 - 21/14 is -23/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 14 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
7/20 = 7 × 7/20 × 7 = 49/140 - Likewise, for the 2nd fraction, since 14 × 10 = 140,
21/14 = 21 × 10/14 × 10 = 210/140 - Subtract the two like fractions:
49/140 - 210/140 = 49 - 210/140 = -161/140 - After reducing the fraction, the answer is -23/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/20-21/14 7/20-42/14 7/40-21/14 7/20-21/28 21/20-21/14 7/20-63/14 7/60-21/14 7/20-21/42 35/20-21/14 7/20-21/70 49/20-21/14 7/20-21/98