Add 63/18 and 18/8, Solve 3 9/18 + 2 2/8 as a fraction

Add 63/18 and 18/8

1^st number: 3 9/18, 2^nd number: 2 2/8

63/18 + 18/8 is 23/4.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 8 is 72

Next, find the equivalent fraction of both fractional numbers with denominator 72
For the 1st fraction, since 18 × 4 = 72,
63/18 = 63 × 4/18 × 4 = 252/72
Likewise, for the 2nd fraction, since 8 × 9 = 72,
18/8 = 18 × 9/8 × 9 = 162/72
Add the two like fractions:
252/72 + 162/72 = 252 + 162/72 = 414/72
414/72 simplified gives 23/4
So, 63/18 + 18/8 = 23/4
In mixed form: 53/4

MathStep (Works offline)

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