Add 63/16 and 20/63, Solve 3 15/16 + 20/63 as a fraction

Add 63/16 and 20/63

1^st number: 3 15/16, 2^nd number: 20/63

63/16 + 20/63 is 4289/1008.

Find the least common denominator or LCM of the two denominators:
LCM of 16 and 63 is 1008

Next, find the equivalent fraction of both fractional numbers with denominator 1008
For the 1st fraction, since 16 × 63 = 1008,
63/16 = 63 × 63/16 × 63 = 3969/1008
Likewise, for the 2nd fraction, since 63 × 16 = 1008,
20/63 = 20 × 16/63 × 16 = 320/1008
Add the two like fractions:
3969/1008 + 320/1008 = 3969 + 320/1008 = 4289/1008
So, 63/16 + 20/63 = 4289/1008
In mixed form: 4257/1008

MathStep (Works offline)

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