Add 3/21 and 12/10
1st number: 3/21, 2nd number: 1 2/10
3/21 + 12/10 is 47/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
3/21 = 3 × 10/21 × 10 = 30/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
12/10 = 12 × 21/10 × 21 = 252/210 - Add the two like fractions:
30/210 + 252/210 = 30 + 252/210 = 282/210 - 282/210 simplified gives 47/35
- So, 3/21 + 12/10 = 47/35
In mixed form: 112/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/21+12/10 3/21+24/10 3/42+12/10 3/21+12/20 9/21+12/10 3/21+36/10 3/63+12/10 3/21+12/30 15/21+12/10 3/21+60/10 3/21+12/50 3/21+84/10 3/21+12/70