Add 20/15 and 2/7
1st number: 1 5/15, 2nd number: 2/7
20/15 + 2/7 is 34/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 7 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
20/15 = 20 × 7/15 × 7 = 140/105 - Likewise, for the 2nd fraction, since 7 × 15 = 105,
2/7 = 2 × 15/7 × 15 = 30/105 - Add the two like fractions:
140/105 + 30/105 = 140 + 30/105 = 170/105 - 170/105 simplified gives 34/21
- So, 20/15 + 2/7 = 34/21
In mixed form: 113/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/15+2/7 20/15+4/7 20/30+2/7 20/15+2/14 60/15+2/7 20/15+6/7 20/45+2/7 20/15+2/21 20/15+10/7 20/75+2/7 20/15+2/35 20/15+14/7 20/15+2/49