Add 9/12 and 72/5, Solve 9/12 + 14 2/5 as a fraction

Add 9/12 and 72/5

1^st number: 9/12, 2^nd number: 14 2/5

9/12 + 72/5 is 303/20.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 5 is 60

Next, find the equivalent fraction of both fractional numbers with denominator 60
For the 1st fraction, since 12 × 5 = 60,
9/12 = 9 × 5/12 × 5 = 45/60
Likewise, for the 2nd fraction, since 5 × 12 = 60,
72/5 = 72 × 12/5 × 12 = 864/60
Add the two like fractions:
45/60 + 864/60 = 45 + 864/60 = 909/60
909/60 simplified gives 303/20
So, 9/12 + 72/5 = 303/20
In mixed form: 153/20

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad