Add 5/12 and 64/45, Solve 5/12 + 1 19/45 as a fraction

Add 5/12 and 64/45

1^st number: 5/12, 2^nd number: 1 19/45

5/12 + 64/45 is 331/180.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 45 is 180

Next, find the equivalent fraction of both fractional numbers with denominator 180
For the 1st fraction, since 12 × 15 = 180,
5/12 = 5 × 15/12 × 15 = 75/180
Likewise, for the 2nd fraction, since 45 × 4 = 180,
64/45 = 64 × 4/45 × 4 = 256/180
Add the two like fractions:
75/180 + 256/180 = 75 + 256/180 = 331/180
So, 5/12 + 64/45 = 331/180
In mixed form: 1151/180

MathStep (Works offline)

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