Add 63/8 and 21/10
1st number: 7 7/8, 2nd number: 2 1/10
63/8 + 21/10 is 399/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 10 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
63/8 = 63 × 5/8 × 5 = 315/40 - Likewise, for the 2nd fraction, since 10 × 4 = 40,
21/10 = 21 × 4/10 × 4 = 84/40 - Add the two like fractions:
315/40 + 84/40 = 315 + 84/40 = 399/40 - So, 63/8 + 21/10 = 399/40
In mixed form: 939/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/8+42/10 63/16+21/10 63/8+21/20 63/8+63/10 63/24+21/10 63/8+21/30 63/40+21/10 63/8+21/50 63/56+21/10 63/8+21/70