Add 18/75 and 63/12, Solve 18/75 + 5 3/12 as a fraction

Add 18/75 and 63/12

1^st number: 18/75, 2^nd number: 5 3/12

18/75 + 63/12 is 549/100.

Find the least common denominator or LCM of the two denominators:
LCM of 75 and 12 is 300

Next, find the equivalent fraction of both fractional numbers with denominator 300
For the 1st fraction, since 75 × 4 = 300,
18/75 = 18 × 4/75 × 4 = 72/300
Likewise, for the 2nd fraction, since 12 × 25 = 300,
63/12 = 63 × 25/12 × 25 = 1575/300
Add the two like fractions:
72/300 + 1575/300 = 72 + 1575/300 = 1647/300
1647/300 simplified gives 549/100
So, 18/75 + 63/12 = 549/100
In mixed form: 549/100

MathStep (Works offline)

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