Add 72/12 and 30/20
1st number: 6 0/12, 2nd number: 1 10/20
72/12 + 30/20 is 15/2.
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,
30/20 = 30 × 3/20 × 3 = 90/60 - Add the two like fractions:
360/60 + 90/60 = 360 + 90/60 = 450/60 - 450/60 simplified gives 15/2
- So, 72/12 + 30/20 = 15/2
In mixed form: 71/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/12+60/20 72/24+30/20 72/12+30/40 72/12+90/20 72/36+30/20 72/12+30/60 72/60+30/20 72/84+30/20