Add 70/90 and 70/12
1st number: 70/90, 2nd number: 5 10/12
70/90 + 70/12 is 119/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 12 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
70/90 = 70 × 2/90 × 2 = 140/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
70/12 = 70 × 15/12 × 15 = 1050/180 - Add the two like fractions:
140/180 + 1050/180 = 140 + 1050/180 = 1190/180 - 1190/180 simplified gives 119/18
- So, 70/90 + 70/12 = 119/18
In mixed form: 611/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/90+70/24 70/90+70/36 70/90+70/60 70/90+70/84