Add 21/6 and 21/7
1st number: 3 3/6, 2nd number: 3 0/7
21/6 + 21/7 is 13/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 7 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 7 × 6 = 42,
21/7 = 21 × 6/7 × 6 = 126/42 - Add the two like fractions:
147/42 + 126/42 = 147 + 126/42 = 273/42 - 273/42 simplified gives 13/2
- So, 21/6 + 21/7 = 13/2
In mixed form: 61/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/6+21/7 21/6+42/7 21/12+21/7 21/6+21/14 63/6+21/7 21/6+63/7 21/18+21/7 21/30+21/7 21/6+21/35 21/42+21/7 21/6+21/49