Subtract 21/7 from 14/20
1st number: 14/20, 2nd number: 3 0/7
14/20 - 21/7 is -23/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
14/20 = 14 × 7/20 × 7 = 98/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
21/7 = 21 × 20/7 × 20 = 420/140 - Subtract the two like fractions:
98/140 - 420/140 = 98 - 420/140 = -322/140 - After reducing the fraction, the answer is -23/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/20-21/7 14/20-42/7 14/40-21/7 14/20-21/14 42/20-21/7 14/20-63/7 14/60-21/7 70/20-21/7 14/20-21/35 98/20-21/7 14/20-21/49