Add 12/18 and 30/80
12/18 + 30/80 is 25/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 18 × 40 = 720,
12/18 = 12 × 40/18 × 40 = 480/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
30/80 = 30 × 9/80 × 9 = 270/720 - Add the two like fractions:
480/720 + 270/720 = 480 + 270/720 = 750/720 - 750/720 simplified gives 25/24
- So, 12/18 + 30/80 = 25/24
In mixed form: 11/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/18+30/80 12/18+60/80 12/36+30/80 36/18+30/80 12/18+90/80 12/54+30/80 60/18+30/80 12/90+30/80 84/18+30/80