Add 5/6 and 12/21
5/6 + 12/21 is 59/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
5/6 = 5 × 7/6 × 7 = 35/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
12/21 = 12 × 2/21 × 2 = 24/42 - Add the two like fractions:
35/42 + 24/42 = 35 + 24/42 = 59/42 - So, 5/6 + 12/21 = 59/42
In mixed form: 117/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/6+12/21 5/6+24/21 5/12+12/21 5/6+12/42 15/6+12/21 5/6+36/21 5/18+12/21 5/6+12/63 25/6+12/21 5/6+60/21 5/30+12/21 35/6+12/21 5/6+84/21 5/42+12/21