Add 7/10 and 21/12
1st number: 7/10, 2nd number: 1 9/12
7/10 + 21/12 is 49/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 10 × 6 = 60,
7/10 = 7 × 6/10 × 6 = 42/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
21/12 = 21 × 5/12 × 5 = 105/60 - Add the two like fractions:
42/60 + 105/60 = 42 + 105/60 = 147/60 - 147/60 simplified gives 49/20
- So, 7/10 + 21/12 = 49/20
In mixed form: 29/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/10+21/12 7/10+42/12 7/20+21/12 7/10+21/24 21/10+21/12 7/10+63/12 7/30+21/12 7/10+21/36 35/10+21/12 7/50+21/12 7/10+21/60 49/10+21/12 7/70+21/12 7/10+21/84