Add 5/7 and 7/10
5/7 + 7/10 is 99/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 10 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 7 × 10 = 70,
5/7 = 5 × 10/7 × 10 = 50/70 - Likewise, for the 2nd fraction, since 10 × 7 = 70,
7/10 = 7 × 7/10 × 7 = 49/70 - Add the two like fractions:
50/70 + 49/70 = 50 + 49/70 = 99/70 - So, 5/7 + 7/10 = 99/70
In mixed form: 129/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/7+7/10 5/7+14/10 5/14+7/10 5/7+7/20 15/7+7/10 5/7+21/10 5/21+7/10 5/7+7/30 25/7+7/10 5/7+35/10 5/35+7/10 5/7+7/50 35/7+7/10 5/7+49/10 5/49+7/10 5/7+7/70