Add 18/72 and 25/8, Solve 18/72 + 3 1/8 as a fraction

Add 18/72 and 25/8

1^st number: 18/72, 2^nd number: 3 1/8

18/72 + 25/8 is 27/8.

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

Next, find the equivalent fraction of both fractional numbers with denominator 72
For the 1st fraction, since 72 × 1 = 72,
18/72 = 18 × 1/72 × 1 = 18/72
Likewise, for the 2nd fraction, since 8 × 9 = 72,
25/8 = 25 × 9/8 × 9 = 225/72
Add the two like fractions:
18/72 + 225/72 = 18 + 225/72 = 243/72
243/72 simplified gives 27/8
So, 18/72 + 25/8 = 27/8
In mixed form: 33/8

MathStep (Works offline)

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