Add 21/10 and 63/12
1st number: 2 1/10, 2nd number: 5 3/12
21/10 + 63/12 is 147/20.
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,
21/10 = 21 × 6/10 × 6 = 126/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
63/12 = 63 × 5/12 × 5 = 315/60 - Add the two like fractions:
126/60 + 315/60 = 126 + 315/60 = 441/60 - 441/60 simplified gives 147/20
- So, 21/10 + 63/12 = 147/20
In mixed form: 77/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/10+63/12 21/20+63/12 21/10+63/24 63/10+63/12 21/30+63/12 21/10+63/36 21/50+63/12 21/10+63/60 21/70+63/12 21/10+63/84