Add 35/21 and 70/9
1st number: 1 14/21, 2nd number: 7 7/9
35/21 + 70/9 is 85/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
35/21 = 35 × 3/21 × 3 = 105/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
70/9 = 70 × 7/9 × 7 = 490/63 - Add the two like fractions:
105/63 + 490/63 = 105 + 490/63 = 595/63 - 595/63 simplified gives 85/9
- So, 35/21 + 70/9 = 85/9
In mixed form: 94/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/21+70/9 35/42+70/9 35/21+70/18 35/63+70/9 35/21+70/27 35/21+70/45 35/21+70/63