Add 42/15 and 25/18
1st number: 2 12/15, 2nd number: 1 7/18
42/15 + 25/18 is 377/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
42/15 = 42 × 6/15 × 6 = 252/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
25/18 = 25 × 5/18 × 5 = 125/90 - Add the two like fractions:
252/90 + 125/90 = 252 + 125/90 = 377/90 - So, 42/15 + 25/18 = 377/90
In mixed form: 417/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/15+25/18 42/15+50/18 42/30+25/18 42/15+25/36 42/15+75/18 42/45+25/18 42/15+25/54 42/75+25/18 42/15+25/90