Add 21/10 and 12/35
1st number: 2 1/10, 2nd number: 12/35
21/10 + 12/35 is 171/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 35 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 10 × 7 = 70,
21/10 = 21 × 7/10 × 7 = 147/70 - Likewise, for the 2nd fraction, since 35 × 2 = 70,
12/35 = 12 × 2/35 × 2 = 24/70 - Add the two like fractions:
147/70 + 24/70 = 147 + 24/70 = 171/70 - So, 21/10 + 12/35 = 171/70
In mixed form: 231/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/10+12/35 21/10+24/35 21/20+12/35 21/10+12/70 63/10+12/35 21/10+36/35 21/30+12/35 21/10+60/35 21/50+12/35 21/10+84/35 21/70+12/35