Add 18/4 and 70/9
1st number: 4 2/4, 2nd number: 7 7/9
18/4 + 70/9 is 221/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 9 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 4 × 9 = 36,
18/4 = 18 × 9/4 × 9 = 162/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
70/9 = 70 × 4/9 × 4 = 280/36 - Add the two like fractions:
162/36 + 280/36 = 162 + 280/36 = 442/36 - 442/36 simplified gives 221/18
- So, 18/4 + 70/9 = 221/18
In mixed form: 125/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/4+70/9 18/8+70/9 18/4+70/18 54/4+70/9 18/12+70/9 18/4+70/27 90/4+70/9 18/20+70/9 18/4+70/45 18/28+70/9 18/4+70/63