Add 72/12 and 9/20
1st number: 6 0/12, 2nd number: 9/20
72/12 + 9/20 is 129/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
72/12 = 72 × 5/12 × 5 = 360/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
9/20 = 9 × 3/20 × 3 = 27/60 - Add the two like fractions:
360/60 + 27/60 = 360 + 27/60 = 387/60 - 387/60 simplified gives 129/20
- So, 72/12 + 9/20 = 129/20
In mixed form: 69/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/12+18/20 72/24+9/20 72/12+9/40 72/12+27/20 72/36+9/20 72/12+9/60 72/12+45/20 72/60+9/20 72/12+63/20 72/84+9/20