Add 3/21 and 5/10
3/21 + 5/10 is 9/14.
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,
5/10 = 5 × 21/10 × 21 = 105/210 - Add the two like fractions:
30/210 + 105/210 = 30 + 105/210 = 135/210 - 135/210 simplified gives 9/14
- So, 3/21 + 5/10 = 9/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/21+5/10 3/42+5/10 3/21+5/20 9/21+5/10 3/21+15/10 3/63+5/10 3/21+5/30 15/21+5/10 3/21+25/10 3/21+5/50 3/21+35/10 3/21+5/70