Add 3/12 and 80/90
3/12 + 80/90 is 41/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 12 × 15 = 180,
3/12 = 3 × 15/12 × 15 = 45/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
80/90 = 80 × 2/90 × 2 = 160/180 - Add the two like fractions:
45/180 + 160/180 = 45 + 160/180 = 205/180 - 205/180 simplified gives 41/36
- So, 3/12 + 80/90 = 41/36
In mixed form: 15/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/12+80/90 3/24+80/90 9/12+80/90 3/36+80/90 15/12+80/90 3/60+80/90 21/12+80/90 3/84+80/90