Add 12/36 and 70/90
12/36 + 70/90 is 10/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 36 × 5 = 180,
12/36 = 12 × 5/36 × 5 = 60/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
70/90 = 70 × 2/90 × 2 = 140/180 - Add the two like fractions:
60/180 + 140/180 = 60 + 140/180 = 200/180 - 200/180 simplified gives 10/9
- So, 12/36 + 70/90 = 10/9
In mixed form: 11/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/36+70/90 12/72+70/90 60/36+70/90 84/36+70/90