Add 15/6 and 21/36, Solve 2 3/6 + 21/36 as a fraction

Add 15/6 and 21/36

1^st number: 2 3/6, 2^nd number: 21/36

15/6 + 21/36 is 37/12.

Find the least common denominator or LCM of the two denominators:
LCM of 6 and 36 is 36

Next, find the equivalent fraction of both fractional numbers with denominator 36
For the 1st fraction, since 6 × 6 = 36,
15/6 = 15 × 6/6 × 6 = 90/36
Likewise, for the 2nd fraction, since 36 × 1 = 36,
21/36 = 21 × 1/36 × 1 = 21/36
Add the two like fractions:
90/36 + 21/36 = 90 + 21/36 = 111/36
111/36 simplified gives 37/12
So, 15/6 + 21/36 = 37/12
In mixed form: 31/12

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad