Add 72/12 and 84/20
1st number: 6 0/12, 2nd number: 4 4/20
72/12 + 84/20 is 51/5.
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,
84/20 = 84 × 3/20 × 3 = 252/60 - Add the two like fractions:
360/60 + 252/60 = 360 + 252/60 = 612/60 - 612/60 simplified gives 51/5
- So, 72/12 + 84/20 = 51/5
In mixed form: 101/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/24+84/20 72/12+84/40 72/36+84/20 72/12+84/60 72/60+84/20 72/84+84/20