Add 18/8 and 15/7
1st number: 2 2/8, 2nd number: 2 1/7
18/8 + 15/7 is 123/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 7 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 8 × 7 = 56,
18/8 = 18 × 7/8 × 7 = 126/56 - Likewise, for the 2nd fraction, since 7 × 8 = 56,
15/7 = 15 × 8/7 × 8 = 120/56 - Add the two like fractions:
126/56 + 120/56 = 126 + 120/56 = 246/56 - 246/56 simplified gives 123/28
- So, 18/8 + 15/7 = 123/28
In mixed form: 411/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/8+15/7 18/8+30/7 18/16+15/7 18/8+15/14 54/8+15/7 18/8+45/7 18/24+15/7 18/8+15/21 90/8+15/7 18/8+75/7 18/40+15/7 18/8+15/35 18/56+15/7 18/8+15/49