Add 8/15 and 21/25
8/15 + 21/25 is 103/75.
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,
8/15 = 8 × 5/15 × 5 = 40/75 - Likewise, for the 2nd fraction, since 25 × 3 = 75,
21/25 = 21 × 3/25 × 3 = 63/75 - Add the two like fractions:
40/75 + 63/75 = 40 + 63/75 = 103/75 - So, 8/15 + 21/25 = 103/75
In mixed form: 128/75
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/15+21/25 8/15+42/25 8/30+21/25 8/15+21/50 24/15+21/25 8/15+63/25 8/45+21/25 8/15+21/75 40/15+21/25 8/75+21/25 56/15+21/25