Add 30/12 and 21/4
1st number: 2 6/12, 2nd number: 5 1/4
30/12 + 21/4 is 31/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 4 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 12 × 1 = 12,
30/12 = 30 × 1/12 × 1 = 30/12 - Likewise, for the 2nd fraction, since 4 × 3 = 12,
21/4 = 21 × 3/4 × 3 = 63/12 - Add the two like fractions:
30/12 + 63/12 = 30 + 63/12 = 93/12 - 93/12 simplified gives 31/4
- So, 30/12 + 21/4 = 31/4
In mixed form: 73/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/12+21/4 30/12+42/4 30/24+21/4 30/12+21/8 90/12+21/4 30/12+63/4 30/36+21/4 30/12+21/12 30/60+21/4 30/12+21/20 30/84+21/4 30/12+21/28