Add 42/35 and 21/9
1st number: 1 7/35, 2nd number: 2 3/9
42/35 + 21/9 is 53/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 9 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 35 × 9 = 315,
42/35 = 42 × 9/35 × 9 = 378/315 - Likewise, for the 2nd fraction, since 9 × 35 = 315,
21/9 = 21 × 35/9 × 35 = 735/315 - Add the two like fractions:
378/315 + 735/315 = 378 + 735/315 = 1113/315 - 1113/315 simplified gives 53/15
- So, 42/35 + 21/9 = 53/15
In mixed form: 38/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/35+21/9 42/35+42/9 42/70+21/9 42/35+21/18 42/35+63/9 42/35+21/27 42/35+21/45 42/35+21/63