Add 63/21 and 21/8
1st number: 3 0/21, 2nd number: 2 5/8
63/21 + 21/8 is 45/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
63/21 = 63 × 8/21 × 8 = 504/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
21/8 = 21 × 21/8 × 21 = 441/168 - Add the two like fractions:
504/168 + 441/168 = 504 + 441/168 = 945/168 - 945/168 simplified gives 45/8
- So, 63/21 + 21/8 = 45/8
In mixed form: 55/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/21+42/8 63/42+21/8 63/21+21/16 63/21+63/8 63/21+21/24 63/21+21/40 63/21+21/56