Add 20/8 and 21/63
1st number: 2 4/8, 2nd number: 21/63
20/8 + 21/63 is 17/6.
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,
20/8 = 20 × 63/8 × 63 = 1260/504 - Likewise, for the 2nd fraction, since 63 × 8 = 504,
21/63 = 21 × 8/63 × 8 = 168/504 - Add the two like fractions:
1260/504 + 168/504 = 1260 + 168/504 = 1428/504 - 1428/504 simplified gives 17/6
- So, 20/8 + 21/63 = 17/6
In mixed form: 25/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/8+21/63 20/8+42/63 20/16+21/63 60/8+21/63 20/24+21/63 20/40+21/63 20/56+21/63