Add 18/9 and 7/70
1st number: 2 0/9, 2nd number: 7/70
18/9 + 7/70 is 21/10.
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,
18/9 = 18 × 70/9 × 70 = 1260/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
7/70 = 7 × 9/70 × 9 = 63/630 - Add the two like fractions:
1260/630 + 63/630 = 1260 + 63/630 = 1323/630 - 1323/630 simplified gives 21/10
- So, 18/9 + 7/70 = 21/10
In mixed form: 21/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/9+7/70 18/9+14/70 54/9+7/70 18/9+21/70 18/27+7/70 90/9+7/70 18/9+35/70 18/45+7/70 18/9+49/70 18/63+7/70