Add 30/70 and 15/9
1st number: 30/70, 2nd number: 1 6/9
30/70 + 15/9 is 44/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 9 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
30/70 = 30 × 9/70 × 9 = 270/630 - Likewise, for the 2nd fraction, since 9 × 70 = 630,
15/9 = 15 × 70/9 × 70 = 1050/630 - Add the two like fractions:
270/630 + 1050/630 = 270 + 1050/630 = 1320/630 - 1320/630 simplified gives 44/21
- So, 30/70 + 15/9 = 44/21
In mixed form: 22/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/70+15/9 30/70+30/9 30/70+15/18 90/70+15/9 30/70+45/9 30/70+15/27 30/70+75/9 30/70+15/45 30/70+15/63