Add 21/48 and 12/9
1st number: 21/48, 2nd number: 1 3/9
21/48 + 12/9 is 85/48.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 9 is 144
Next, find the equivalent fraction of both fractional numbers with denominator 144 - For the 1st fraction, since 48 × 3 = 144,
21/48 = 21 × 3/48 × 3 = 63/144 - Likewise, for the 2nd fraction, since 9 × 16 = 144,
12/9 = 12 × 16/9 × 16 = 192/144 - Add the two like fractions:
63/144 + 192/144 = 63 + 192/144 = 255/144 - 255/144 simplified gives 85/48
- So, 21/48 + 12/9 = 85/48
In mixed form: 137/48
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/48+12/9 21/48+24/9 21/96+12/9 21/48+12/18 63/48+12/9 21/48+36/9 21/48+12/27 21/48+60/9 21/48+12/45 21/48+84/9 21/48+12/63