Add 72/12 and 6/21
1st number: 6 0/12, 2nd number: 6/21
72/12 + 6/21 is 44/7.
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,
72/12 = 72 × 7/12 × 7 = 504/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
6/21 = 6 × 4/21 × 4 = 24/84 - Add the two like fractions:
504/84 + 24/84 = 504 + 24/84 = 528/84 - 528/84 simplified gives 44/7
- So, 72/12 + 6/21 = 44/7
In mixed form: 62/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/12+12/21 72/24+6/21 72/12+6/42 72/12+18/21 72/36+6/21 72/12+6/63 72/12+30/21 72/60+6/21 72/12+42/21 72/84+6/21