Add 42/15 and 25/30
1st number: 2 12/15, 2nd number: 25/30
42/15 + 25/30 is 109/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 30 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 15 × 2 = 30,
42/15 = 42 × 2/15 × 2 = 84/30 - Likewise, for the 2nd fraction, since 30 × 1 = 30,
25/30 = 25 × 1/30 × 1 = 25/30 - Add the two like fractions:
84/30 + 25/30 = 84 + 25/30 = 109/30 - So, 42/15 + 25/30 = 109/30
In mixed form: 319/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/15+25/30 42/15+50/30 42/30+25/30 42/15+25/60 42/15+75/30 42/45+25/30 42/15+25/90 42/75+25/30