Add 30/50 and 21/12
1st number: 30/50, 2nd number: 1 9/12
30/50 + 21/12 is 47/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 12 is 300
Next, find the equivalent fraction of both fractional numbers with denominator 300 - For the 1st fraction, since 50 × 6 = 300,
30/50 = 30 × 6/50 × 6 = 180/300 - Likewise, for the 2nd fraction, since 12 × 25 = 300,
21/12 = 21 × 25/12 × 25 = 525/300 - Add the two like fractions:
180/300 + 525/300 = 180 + 525/300 = 705/300 - 705/300 simplified gives 47/20
- So, 30/50 + 21/12 = 47/20
In mixed form: 27/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/50+21/12 30/50+42/12 30/50+21/24 90/50+21/12 30/50+63/12 30/50+21/36 30/50+21/60 30/50+21/84