Add 21/3 and 54/8
1st number: 7 0/3, 2nd number: 6 6/8
21/3 + 54/8 is 55/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 8 is 24
Next, find the equivalent fraction of both fractional numbers with denominator 24 - For the 1st fraction, since 3 × 8 = 24,
21/3 = 21 × 8/3 × 8 = 168/24 - Likewise, for the 2nd fraction, since 8 × 3 = 24,
54/8 = 54 × 3/8 × 3 = 162/24 - Add the two like fractions:
168/24 + 162/24 = 168 + 162/24 = 330/24 - 330/24 simplified gives 55/4
- So, 21/3 + 54/8 = 55/4
In mixed form: 133/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/3+54/8 21/6+54/8 21/3+54/16 63/3+54/8 21/9+54/8 21/3+54/24 21/15+54/8 21/3+54/40 21/3+54/56