Add 30/12 and 70/45
1st number: 2 6/12, 2nd number: 1 25/45
30/12 + 70/45 is 73/18.
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,
70/45 = 70 × 4/45 × 4 = 280/180 - Add the two like fractions:
450/180 + 280/180 = 450 + 280/180 = 730/180 - 730/180 simplified gives 73/18
- So, 30/12 + 70/45 = 73/18
In mixed form: 41/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/12+70/45 30/24+70/45 30/12+70/90 90/12+70/45 30/36+70/45 30/60+70/45 30/84+70/45