Add 2/5 and 5/7
2/5 + 5/7 is 39/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 7 is 35
Next, find the equivalent fraction of both fractional numbers with denominator 35 - For the 1st fraction, since 5 × 7 = 35,
2/5 = 2 × 7/5 × 7 = 14/35 - Likewise, for the 2nd fraction, since 7 × 5 = 35,
5/7 = 5 × 5/7 × 5 = 25/35 - Add the two like fractions:
14/35 + 25/35 = 14 + 25/35 = 39/35 - So, 2/5 + 5/7 = 39/35
In mixed form: 14/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/5+5/7 2/5+10/7 2/10+5/7 2/5+5/14 6/5+5/7 2/5+15/7 2/15+5/7 2/5+5/21 10/5+5/7 2/5+25/7 2/25+5/7 2/5+5/35 14/5+5/7 2/5+35/7 2/35+5/7 2/5+5/49