Add 80/20 and 45/12
1st number: 4 0/20, 2nd number: 3 9/12
80/20 + 45/12 is 31/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
80/20 = 80 × 3/20 × 3 = 240/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
45/12 = 45 × 5/12 × 5 = 225/60 - Add the two like fractions:
240/60 + 225/60 = 240 + 225/60 = 465/60 - 465/60 simplified gives 31/4
- So, 80/20 + 45/12 = 31/4
In mixed form: 73/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/20+90/12 80/40+45/12 80/20+45/24 80/60+45/12 80/20+45/36 80/20+45/60 80/20+45/84