Subtract 7/21 from 5/3
1st number: 1 2/3, 2nd number: 7/21
5/3 - 7/21 is 4/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 21 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
5/3 = 5 × 7/3 × 7 = 35/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
7/21 = 7 × 1/21 × 1 = 7/21 - Subtract the two like fractions:
35/21 - 7/21 = 35 - 7/21 = 28/21 - After reducing the fraction, the answer is 4/3
- In mixed form: 11/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/3-7/21 5/3-14/21 5/6-7/21 5/3-7/42 15/3-7/21 5/9-7/21 5/3-7/63 25/3-7/21 5/3-35/21 5/15-7/21 35/3-7/21 5/3-49/21 5/21-7/21