Add 20/15 and 42/25
1st number: 1 5/15, 2nd number: 1 17/25
20/15 + 42/25 is 226/75.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 25 is 75
Next, find the equivalent fraction of both fractional numbers with denominator 75 - For the 1st fraction, since 15 × 5 = 75,
20/15 = 20 × 5/15 × 5 = 100/75 - Likewise, for the 2nd fraction, since 25 × 3 = 75,
42/25 = 42 × 3/25 × 3 = 126/75 - Add the two like fractions:
100/75 + 126/75 = 100 + 126/75 = 226/75 - So, 20/15 + 42/25 = 226/75
In mixed form: 31/75
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/15+42/25 20/15+84/25 20/30+42/25 20/15+42/50 60/15+42/25 20/45+42/25 20/15+42/75 20/75+42/25