Add 30/12 and 18/45
1st number: 2 6/12, 2nd number: 18/45
30/12 + 18/45 is 29/10.
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,
18/45 = 18 × 4/45 × 4 = 72/180 - Add the two like fractions:
450/180 + 72/180 = 450 + 72/180 = 522/180 - 522/180 simplified gives 29/10
- So, 30/12 + 18/45 = 29/10
In mixed form: 29/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/12+18/45 30/12+36/45 30/24+18/45 30/12+18/90 90/12+18/45 30/12+54/45 30/36+18/45 30/12+90/45 30/60+18/45 30/84+18/45