Add 21/12 and 6/72
1st number: 1 9/12, 2nd number: 6/72
21/12 + 6/72 is 11/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 12 × 6 = 72,
21/12 = 21 × 6/12 × 6 = 126/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
6/72 = 6 × 1/72 × 1 = 6/72 - Add the two like fractions:
126/72 + 6/72 = 126 + 6/72 = 132/72 - 132/72 simplified gives 11/6
- So, 21/12 + 6/72 = 11/6
In mixed form: 15/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/12+6/72 21/12+12/72 21/24+6/72 63/12+6/72 21/12+18/72 21/36+6/72 21/12+30/72 21/60+6/72 21/12+42/72 21/84+6/72