Add 20/45 and 70/12
1st number: 20/45, 2nd number: 5 10/12
20/45 + 70/12 is 113/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 12 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
20/45 = 20 × 4/45 × 4 = 80/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
70/12 = 70 × 15/12 × 15 = 1050/180 - Add the two like fractions:
80/180 + 1050/180 = 80 + 1050/180 = 1130/180 - 1130/180 simplified gives 113/18
- So, 20/45 + 70/12 = 113/18
In mixed form: 65/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/45+70/12 20/90+70/12 20/45+70/24 60/45+70/12 20/45+70/36 20/45+70/60 20/45+70/84