Add 70/90 and 28/18
1st number: 70/90, 2nd number: 1 10/18
70/90 + 28/18 is 7/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
70/90 = 70 × 1/90 × 1 = 70/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
28/18 = 28 × 5/18 × 5 = 140/90 - Add the two like fractions:
70/90 + 140/90 = 70 + 140/90 = 210/90 - 210/90 simplified gives 7/3
- So, 70/90 + 28/18 = 7/3
In mixed form: 21/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/90+56/18 70/90+28/36 70/90+84/18 70/90+28/54 70/90+28/90