Add 12/18 and 30/45
12/18 + 30/45 is 4/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
12/18 = 12 × 5/18 × 5 = 60/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
30/45 = 30 × 2/45 × 2 = 60/90 - Add the two like fractions:
60/90 + 60/90 = 60 + 60/90 = 120/90 - 120/90 simplified gives 4/3
- So, 12/18 + 30/45 = 4/3
In mixed form: 11/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/18+30/45 12/18+60/45 12/36+30/45 12/18+30/90 36/18+30/45 12/18+90/45 12/54+30/45 60/18+30/45 12/90+30/45 84/18+30/45