Add 18/70 and 21/9
1st number: 18/70, 2nd number: 2 3/9
18/70 + 21/9 is 272/105.
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,
18/70 = 18 × 9/70 × 9 = 162/630 - Likewise, for the 2nd fraction, since 9 × 70 = 630,
21/9 = 21 × 70/9 × 70 = 1470/630 - Add the two like fractions:
162/630 + 1470/630 = 162 + 1470/630 = 1632/630 - 1632/630 simplified gives 272/105
- So, 18/70 + 21/9 = 272/105
In mixed form: 262/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/70+21/9 18/70+42/9 18/70+21/18 54/70+21/9 18/70+63/9 18/70+21/27 90/70+21/9 18/70+21/45 18/70+21/63