Add 3/18 and 12/7
1st number: 3/18, 2nd number: 1 5/7
3/18 + 12/7 is 79/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 7 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
3/18 = 3 × 7/18 × 7 = 21/126 - Likewise, for the 2nd fraction, since 7 × 18 = 126,
12/7 = 12 × 18/7 × 18 = 216/126 - Add the two like fractions:
21/126 + 216/126 = 21 + 216/126 = 237/126 - 237/126 simplified gives 79/42
- So, 3/18 + 12/7 = 79/42
In mixed form: 137/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/18+12/7 3/18+24/7 3/36+12/7 3/18+12/14 9/18+12/7 3/18+36/7 3/54+12/7 3/18+12/21 15/18+12/7 3/18+60/7 3/90+12/7 3/18+12/35 21/18+12/7 3/18+84/7 3/18+12/49