Add 30/12 and 9/45
1st number: 2 6/12, 2nd number: 9/45
30/12 + 9/45 is 27/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 12 × 15 = 180,
30/12 = 30 × 15/12 × 15 = 450/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
9/45 = 9 × 4/45 × 4 = 36/180 - Add the two like fractions:
450/180 + 36/180 = 450 + 36/180 = 486/180 - 486/180 simplified gives 27/10
- So, 30/12 + 9/45 = 27/10
In mixed form: 27/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/12+9/45 30/12+18/45 30/24+9/45 30/12+9/90 90/12+9/45 30/12+27/45 30/36+9/45 30/60+9/45 30/12+63/45 30/84+9/45