Add 6/21 and 63/16, Solve 6/21 + 3 15/16 as a fraction

Add 6/21 and 63/16

1^st number: 6/21, 2^nd number: 3 15/16

6/21 + 63/16 is 473/112.

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,
6/21 = 6 × 16/21 × 16 = 96/336
Likewise, for the 2nd fraction, since 16 × 21 = 336,
63/16 = 63 × 21/16 × 21 = 1323/336
Add the two like fractions:
96/336 + 1323/336 = 96 + 1323/336 = 1419/336
1419/336 simplified gives 473/112
So, 6/21 + 63/16 = 473/112
In mixed form: 425/112

MathStep (Works offline)

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