Add 80/12 and 21/30
1st number: 6 8/12, 2nd number: 21/30
80/12 + 21/30 is 221/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
80/12 = 80 × 5/12 × 5 = 400/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
21/30 = 21 × 2/30 × 2 = 42/60 - Add the two like fractions:
400/60 + 42/60 = 400 + 42/60 = 442/60 - 442/60 simplified gives 221/30
- So, 80/12 + 21/30 = 221/30
In mixed form: 711/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/12+42/30 80/24+21/30 80/12+21/60 80/12+63/30 80/36+21/30 80/12+21/90 80/60+21/30 80/84+21/30