Add 42/35 and 21/45
1st number: 1 7/35, 2nd number: 21/45
42/35 + 21/45 is 5/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 45 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 45 × 7 = 315,
21/45 = 21 × 7/45 × 7 = 147/315 - Add the two like fractions:
378/315 + 147/315 = 378 + 147/315 = 525/315 - 525/315 simplified gives 5/3
- So, 42/35 + 21/45 = 5/3
In mixed form: 12/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/35+21/45 42/35+42/45 42/70+21/45 42/35+21/90 42/35+63/45