Add 7/4 and 21/6
1st number: 1 3/4, 2nd number: 3 3/6
7/4 + 21/6 is 21/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 6 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 4 × 3 = 12,
7/4 = 7 × 3/4 × 3 = 21/12 - Likewise, for the 2nd fraction, since 6 × 2 = 12,
21/6 = 21 × 2/6 × 2 = 42/12 - Add the two like fractions:
21/12 + 42/12 = 21 + 42/12 = 63/12 - 63/12 simplified gives 21/4
- So, 7/4 + 21/6 = 21/4
In mixed form: 51/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/4+21/6 7/4+42/6 7/8+21/6 7/4+21/12 21/4+21/6 7/4+63/6 7/12+21/6 7/4+21/18 35/4+21/6 7/20+21/6 7/4+21/30 49/4+21/6 7/28+21/6 7/4+21/42