Add 21/2 and 36/15
1st number: 10 1/2, 2nd number: 2 6/15
21/2 + 36/15 is 129/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 15 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 2 × 15 = 30,
21/2 = 21 × 15/2 × 15 = 315/30 - Likewise, for the 2nd fraction, since 15 × 2 = 30,
36/15 = 36 × 2/15 × 2 = 72/30 - Add the two like fractions:
315/30 + 72/30 = 315 + 72/30 = 387/30 - 387/30 simplified gives 129/10
- So, 21/2 + 36/15 = 129/10
In mixed form: 129/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2+36/15 21/2+72/15 21/4+36/15 21/2+36/30 63/2+36/15 21/6+36/15 21/2+36/45 21/10+36/15 21/2+36/75 21/14+36/15