Add 15/6 and 21/7
1st number: 2 3/6, 2nd number: 3 0/7
15/6 + 21/7 is 11/2.
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,
15/6 = 15 × 7/6 × 7 = 105/42 - Likewise, for the 2nd fraction, since 7 × 6 = 42,
21/7 = 21 × 6/7 × 6 = 126/42 - Add the two like fractions:
105/42 + 126/42 = 105 + 126/42 = 231/42 - 231/42 simplified gives 11/2
- So, 15/6 + 21/7 = 11/2
In mixed form: 51/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/6+21/7 15/6+42/7 15/12+21/7 15/6+21/14 45/6+21/7 15/6+63/7 15/18+21/7 75/6+21/7 15/30+21/7 15/6+21/35 15/42+21/7 15/6+21/49