Add 15/8 and 21/63
1st number: 1 7/8, 2nd number: 21/63
15/8 + 21/63 is 53/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 63 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 8 × 63 = 504,
15/8 = 15 × 63/8 × 63 = 945/504 - Likewise, for the 2nd fraction, since 63 × 8 = 504,
21/63 = 21 × 8/63 × 8 = 168/504 - Add the two like fractions:
945/504 + 168/504 = 945 + 168/504 = 1113/504 - 1113/504 simplified gives 53/24
- So, 15/8 + 21/63 = 53/24
In mixed form: 25/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/8+21/63 15/8+42/63 15/16+21/63 45/8+21/63 15/24+21/63 75/8+21/63 15/40+21/63 15/56+21/63