Add 12/5 and 42/18
1st number: 2 2/5, 2nd number: 2 6/18
12/5 + 42/18 is 71/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 5 × 18 = 90,
12/5 = 12 × 18/5 × 18 = 216/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
42/18 = 42 × 5/18 × 5 = 210/90 - Add the two like fractions:
216/90 + 210/90 = 216 + 210/90 = 426/90 - 426/90 simplified gives 71/15
- So, 12/5 + 42/18 = 71/15
In mixed form: 411/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/5+42/18 12/5+84/18 12/10+42/18 12/5+42/36 36/5+42/18 12/15+42/18 12/5+42/54 60/5+42/18 12/25+42/18 12/5+42/90 84/5+42/18 12/35+42/18