Add 10/12 and 6/21
10/12 + 6/21 is 47/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
10/12 = 10 × 7/12 × 7 = 70/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
6/21 = 6 × 4/21 × 4 = 24/84 - Add the two like fractions:
70/84 + 24/84 = 70 + 24/84 = 94/84 - 94/84 simplified gives 47/42
- So, 10/12 + 6/21 = 47/42
In mixed form: 15/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/12+6/21 10/12+12/21 10/24+6/21 10/12+6/42 30/12+6/21 10/12+18/21 10/36+6/21 10/12+6/63 50/12+6/21 10/12+30/21 10/60+6/21 70/12+6/21 10/12+42/21 10/84+6/21