Add 15/12 and 80/20
1st number: 1 3/12, 2nd number: 4 0/20
15/12 + 80/20 is 21/4.
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,
15/12 = 15 × 5/12 × 5 = 75/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
80/20 = 80 × 3/20 × 3 = 240/60 - Add the two like fractions:
75/60 + 240/60 = 75 + 240/60 = 315/60 - 315/60 simplified gives 21/4
- So, 15/12 + 80/20 = 21/4
In mixed form: 51/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/12+80/20 15/24+80/20 15/12+80/40 45/12+80/20 15/36+80/20 15/12+80/60 75/12+80/20 15/60+80/20 15/84+80/20