Add 3/15 and 12/7
1st number: 3/15, 2nd number: 1 5/7
3/15 + 12/7 is 67/35.
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,
3/15 = 3 × 7/15 × 7 = 21/105 - Likewise, for the 2nd fraction, since 7 × 15 = 105,
12/7 = 12 × 15/7 × 15 = 180/105 - Add the two like fractions:
21/105 + 180/105 = 21 + 180/105 = 201/105 - 201/105 simplified gives 67/35
- So, 3/15 + 12/7 = 67/35
In mixed form: 132/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/15+12/7 3/15+24/7 3/30+12/7 3/15+12/14 9/15+12/7 3/15+36/7 3/45+12/7 3/15+12/21 3/15+60/7 3/75+12/7 3/15+12/35 21/15+12/7 3/15+84/7 3/15+12/49