Add 21/63 and 6/8
21/63 + 6/8 is 13/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 8 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 63 × 8 = 504,
21/63 = 21 × 8/63 × 8 = 168/504 - Likewise, for the 2nd fraction, since 8 × 63 = 504,
6/8 = 6 × 63/8 × 63 = 378/504 - Add the two like fractions:
168/504 + 378/504 = 168 + 378/504 = 546/504 - 546/504 simplified gives 13/12
- So, 21/63 + 6/8 = 13/12
In mixed form: 11/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/63+6/8 21/63+12/8 21/63+6/16 21/63+18/8 21/63+6/24 21/63+30/8 21/63+6/40 21/63+42/8 21/63+6/56