Add 15/9 and 28/70
1st number: 1 6/9, 2nd number: 28/70
15/9 + 28/70 is 31/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 9 × 70 = 630,
15/9 = 15 × 70/9 × 70 = 1050/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
28/70 = 28 × 9/70 × 9 = 252/630 - Add the two like fractions:
1050/630 + 252/630 = 1050 + 252/630 = 1302/630 - 1302/630 simplified gives 31/15
- So, 15/9 + 28/70 = 31/15
In mixed form: 21/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/9+28/70 15/9+56/70 15/18+28/70 45/9+28/70 15/9+84/70 15/27+28/70 75/9+28/70 15/45+28/70 15/63+28/70