Add 21/6 and 8/21
1st number: 3 3/6, 2nd number: 8/21
21/6 + 8/21 is 163/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
21/6 = 21 × 7/6 × 7 = 147/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
8/21 = 8 × 2/21 × 2 = 16/42 - Add the two like fractions:
147/42 + 16/42 = 147 + 16/42 = 163/42 - So, 21/6 + 8/21 = 163/42
In mixed form: 337/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/6+8/21 21/6+16/21 21/12+8/21 21/6+8/42 63/6+8/21 21/6+24/21 21/18+8/21 21/6+8/63 21/6+40/21 21/30+8/21 21/6+56/21 21/42+8/21