Add 54/9 and 21/84
1st number: 6 0/9, 2nd number: 21/84
54/9 + 21/84 is 25/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 84 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 9 × 28 = 252,
54/9 = 54 × 28/9 × 28 = 1512/252 - Likewise, for the 2nd fraction, since 84 × 3 = 252,
21/84 = 21 × 3/84 × 3 = 63/252 - Add the two like fractions:
1512/252 + 63/252 = 1512 + 63/252 = 1575/252 - 1575/252 simplified gives 25/4
- So, 54/9 + 21/84 = 25/4
In mixed form: 61/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/9+42/84 54/18+21/84 54/9+63/84 54/27+21/84 54/45+21/84 54/63+21/84