Add 21/2 and 3/21
1st number: 10 1/2, 2nd number: 3/21
21/2 + 3/21 is 149/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 2 × 21 = 42,
21/2 = 21 × 21/2 × 21 = 441/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
3/21 = 3 × 2/21 × 2 = 6/42 - Add the two like fractions:
441/42 + 6/42 = 441 + 6/42 = 447/42 - 447/42 simplified gives 149/14
- So, 21/2 + 3/21 = 149/14
In mixed form: 109/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2+3/21 21/2+6/21 21/4+3/21 21/2+3/42 63/2+3/21 21/2+9/21 21/6+3/21 21/2+3/63 21/2+15/21 21/10+3/21 21/14+3/21