Add 6/4 and 21/30
1st number: 1 2/4, 2nd number: 21/30
6/4 + 21/30 is 11/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 4 × 15 = 60,
6/4 = 6 × 15/4 × 15 = 90/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
21/30 = 21 × 2/30 × 2 = 42/60 - Add the two like fractions:
90/60 + 42/60 = 90 + 42/60 = 132/60 - 132/60 simplified gives 11/5
- So, 6/4 + 21/30 = 11/5
In mixed form: 21/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/4+21/30 6/4+42/30 6/8+21/30 6/4+21/60 18/4+21/30 6/4+63/30 6/12+21/30 6/4+21/90 30/4+21/30 6/20+21/30 42/4+21/30 6/28+21/30