Add 3/21 and 25/16, Solve 3/21 + 1 9/16 as a fraction

Add 3/21 and 25/16

1^st number: 3/21, 2^nd number: 1 9/16

3/21 + 25/16 is 191/112.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 16 is 336

Next, find the equivalent fraction of both fractional numbers with denominator 336
For the 1st fraction, since 21 × 16 = 336,
3/21 = 3 × 16/21 × 16 = 48/336
Likewise, for the 2nd fraction, since 16 × 21 = 336,
25/16 = 25 × 21/16 × 21 = 525/336
Add the two like fractions:
48/336 + 525/336 = 48 + 525/336 = 573/336
573/336 simplified gives 191/112
So, 3/21 + 25/16 = 191/112
In mixed form: 179/112

MathStep (Works offline)

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