Subtract 2/21 from 8/3
1st number: 2 2/3, 2nd number: 2/21
8/3 - 2/21 is 18/7.
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,
8/3 = 8 × 7/3 × 7 = 56/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
2/21 = 2 × 1/21 × 1 = 2/21 - Subtract the two like fractions:
56/21 - 2/21 = 56 - 2/21 = 54/21 - After reducing the fraction, the answer is 18/7
- In mixed form: 24/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/3-2/21 8/3-4/21 8/6-2/21 8/3-2/42 24/3-2/21 8/3-6/21 8/9-2/21 8/3-2/63 40/3-2/21 8/3-10/21 8/15-2/21 56/3-2/21 8/3-14/21 8/21-2/21