Add 63/15 and 21/8
1st number: 4 3/15, 2nd number: 2 5/8
63/15 + 21/8 is 273/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 8 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 15 × 8 = 120,
63/15 = 63 × 8/15 × 8 = 504/120 - Likewise, for the 2nd fraction, since 8 × 15 = 120,
21/8 = 21 × 15/8 × 15 = 315/120 - Add the two like fractions:
504/120 + 315/120 = 504 + 315/120 = 819/120 - 819/120 simplified gives 273/40
- So, 63/15 + 21/8 = 273/40
In mixed form: 633/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/15+42/8 63/30+21/8 63/15+21/16 63/15+63/8 63/45+21/8 63/15+21/24 63/75+21/8 63/15+21/40 63/15+21/56