Add 15/7 and 12/8
1st number: 2 1/7, 2nd number: 1 4/8
15/7 + 12/8 is 51/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 8 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 7 × 8 = 56,
15/7 = 15 × 8/7 × 8 = 120/56 - Likewise, for the 2nd fraction, since 8 × 7 = 56,
12/8 = 12 × 7/8 × 7 = 84/56 - Add the two like fractions:
120/56 + 84/56 = 120 + 84/56 = 204/56 - 204/56 simplified gives 51/14
- So, 15/7 + 12/8 = 51/14
In mixed form: 39/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/7+12/8 15/7+24/8 15/14+12/8 15/7+12/16 45/7+12/8 15/7+36/8 15/21+12/8 15/7+12/24 75/7+12/8 15/7+60/8 15/35+12/8 15/7+12/40 15/7+84/8 15/49+12/8 15/7+12/56