Add 1/5 and 42/18
1st number: 1/5, 2nd number: 2 6/18
1/5 + 42/18 is 38/15.
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,
1/5 = 1 × 18/5 × 18 = 18/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
42/18 = 42 × 5/18 × 5 = 210/90 - Add the two like fractions:
18/90 + 210/90 = 18 + 210/90 = 228/90 - 228/90 simplified gives 38/15
- So, 1/5 + 42/18 = 38/15
In mixed form: 28/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/5+42/18 1/5+84/18 1/10+42/18 1/5+42/36 3/5+42/18 1/15+42/18 1/5+42/54 1/25+42/18 1/5+42/90 7/5+42/18 1/35+42/18