Subtract 21/7 from 4/3
1st number: 1 1/3, 2nd number: 3 0/7
4/3 - 21/7 is -5/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 7 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
4/3 = 4 × 7/3 × 7 = 28/21 - Likewise, for the 2nd fraction, since 7 × 3 = 21,
21/7 = 21 × 3/7 × 3 = 63/21 - Subtract the two like fractions:
28/21 - 63/21 = 28 - 63/21 = -35/21 - After reducing the fraction, the answer is -5/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/3-21/7 4/3-42/7 4/6-21/7 4/3-21/14 12/3-21/7 4/3-63/7 4/9-21/7 20/3-21/7 4/15-21/7 4/3-21/35 28/3-21/7 4/21-21/7 4/3-21/49