Add 21/10 and 63/36
1st number: 2 1/10, 2nd number: 1 27/36
21/10 + 63/36 is 77/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 10 × 18 = 180,
21/10 = 21 × 18/10 × 18 = 378/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
63/36 = 63 × 5/36 × 5 = 315/180 - Add the two like fractions:
378/180 + 315/180 = 378 + 315/180 = 693/180 - 693/180 simplified gives 77/20
- So, 21/10 + 63/36 = 77/20
In mixed form: 317/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/10+63/36 21/20+63/36 21/10+63/72 63/10+63/36 21/30+63/36 21/50+63/36 21/70+63/36