Add 42/35 and 21/10
1st number: 1 7/35, 2nd number: 2 1/10
42/35 + 21/10 is 33/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 10 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 35 × 2 = 70,
42/35 = 42 × 2/35 × 2 = 84/70 - Likewise, for the 2nd fraction, since 10 × 7 = 70,
21/10 = 21 × 7/10 × 7 = 147/70 - Add the two like fractions:
84/70 + 147/70 = 84 + 147/70 = 231/70 - 231/70 simplified gives 33/10
- So, 42/35 + 21/10 = 33/10
In mixed form: 33/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/35+21/10 42/35+42/10 42/70+21/10 42/35+21/20 42/35+63/10 42/35+21/30 42/35+21/50 42/35+21/70