Add 21/10 and 10/12, Solve 2 1/10 + 10/12 as a fraction

Add 21/10 and 10/12

1^st number: 2 1/10, 2^nd number: 10/12

21/10 + 10/12 is 44/15.

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 12 is 60

Next, find the equivalent fraction of both fractional numbers with denominator 60
For the 1st fraction, since 10 × 6 = 60,
21/10 = 21 × 6/10 × 6 = 126/60
Likewise, for the 2nd fraction, since 12 × 5 = 60,
10/12 = 10 × 5/12 × 5 = 50/60
Add the two like fractions:
126/60 + 50/60 = 126 + 50/60 = 176/60
176/60 simplified gives 44/15
So, 21/10 + 10/12 = 44/15
In mixed form: 214/15

MathStep (Works offline)

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