Add 70/21 and 5/9
1st number: 3 7/21, 2nd number: 5/9
70/21 + 5/9 is 35/9.
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,
70/21 = 70 × 3/21 × 3 = 210/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
5/9 = 5 × 7/9 × 7 = 35/63 - Add the two like fractions:
210/63 + 35/63 = 210 + 35/63 = 245/63 - 245/63 simplified gives 35/9
- So, 70/21 + 5/9 = 35/9
In mixed form: 38/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/21+10/9 70/42+5/9 70/21+5/18 70/21+15/9 70/63+5/9 70/21+5/27 70/21+25/9 70/21+5/45 70/21+35/9 70/21+5/63