Add 12/15 and 42/7
1st number: 12/15, 2nd number: 6 0/7
12/15 + 42/7 is 34/5.
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,
12/15 = 12 × 7/15 × 7 = 84/105 - Likewise, for the 2nd fraction, since 7 × 15 = 105,
42/7 = 42 × 15/7 × 15 = 630/105 - Add the two like fractions:
84/105 + 630/105 = 84 + 630/105 = 714/105 - 714/105 simplified gives 34/5
- So, 12/15 + 42/7 = 34/5
In mixed form: 64/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/15+42/7 12/15+84/7 12/30+42/7 12/15+42/14 36/15+42/7 12/45+42/7 12/15+42/21 60/15+42/7 12/75+42/7 12/15+42/35 84/15+42/7 12/15+42/49