Add 80/4 and 90/12
1st number: 20 0/4, 2nd number: 7 6/12
80/4 + 90/12 is 55/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 12 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 4 × 3 = 12,
80/4 = 80 × 3/4 × 3 = 240/12 - Likewise, for the 2nd fraction, since 12 × 1 = 12,
90/12 = 90 × 1/12 × 1 = 90/12 - Add the two like fractions:
240/12 + 90/12 = 240 + 90/12 = 330/12 - 330/12 simplified gives 55/2
- So, 80/4 + 90/12 = 55/2
In mixed form: 271/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/8+90/12 80/4+90/24 80/12+90/12 80/4+90/36 80/20+90/12 80/4+90/60 80/28+90/12 80/4+90/84