Add 70/18 and 21/9
1st number: 3 16/18, 2nd number: 2 3/9
70/18 + 21/9 is 56/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 9 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 18 × 1 = 18,
70/18 = 70 × 1/18 × 1 = 70/18 - Likewise, for the 2nd fraction, since 9 × 2 = 18,
21/9 = 21 × 2/9 × 2 = 42/18 - Add the two like fractions:
70/18 + 42/18 = 70 + 42/18 = 112/18 - 112/18 simplified gives 56/9
- So, 70/18 + 21/9 = 56/9
In mixed form: 62/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/18+42/9 70/36+21/9 70/18+21/18 70/18+63/9 70/54+21/9 70/18+21/27 70/90+21/9 70/18+21/45 70/18+21/63