Add 15/2 and 6/21
1st number: 7 1/2, 2nd number: 6/21
15/2 + 6/21 is 109/14.
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,
15/2 = 15 × 21/2 × 21 = 315/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
6/21 = 6 × 2/21 × 2 = 12/42 - Add the two like fractions:
315/42 + 12/42 = 315 + 12/42 = 327/42 - 327/42 simplified gives 109/14
- So, 15/2 + 6/21 = 109/14
In mixed form: 711/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/2+6/21 15/2+12/21 15/4+6/21 15/2+6/42 45/2+6/21 15/2+18/21 15/6+6/21 15/2+6/63 75/2+6/21 15/2+30/21 15/10+6/21 15/2+42/21 15/14+6/21