Add 48/9 and 21/84, Solve 5 3/9 + 21/84 as a fraction

Add 48/9 and 21/84

1^st number: 5 3/9, 2^nd number: 21/84

48/9 + 21/84 is 67/12.

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,
48/9 = 48 × 28/9 × 28 = 1344/252
Likewise, for the 2nd fraction, since 84 × 3 = 252,
21/84 = 21 × 3/84 × 3 = 63/252
Add the two like fractions:
1344/252 + 63/252 = 1344 + 63/252 = 1407/252
1407/252 simplified gives 67/12
So, 48/9 + 21/84 = 67/12
In mixed form: 57/12

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad