Add 45/12 and 27/25, Solve 3 9/12 + 1 2/25 as a fraction

Add 45/12 and 27/25

1^st number: 3 9/12, 2^nd number: 1 2/25

45/12 + 27/25 is 483/100.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 25 is 300

Next, find the equivalent fraction of both fractional numbers with denominator 300
For the 1st fraction, since 12 × 25 = 300,
45/12 = 45 × 25/12 × 25 = 1125/300
Likewise, for the 2nd fraction, since 25 × 12 = 300,
27/25 = 27 × 12/25 × 12 = 324/300
Add the two like fractions:
1125/300 + 324/300 = 1125 + 324/300 = 1449/300
1449/300 simplified gives 483/100
So, 45/12 + 27/25 = 483/100
In mixed form: 483/100

MathStep (Works offline)

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