Add 20/12 and 81/50, Solve 1 8/12 + 1 31/50 as a fraction

Add 20/12 and 81/50

1^st number: 1 8/12, 2^nd number: 1 31/50

20/12 + 81/50 is 493/150.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 50 is 300

Next, find the equivalent fraction of both fractional numbers with denominator 300
For the 1st fraction, since 12 × 25 = 300,
20/12 = 20 × 25/12 × 25 = 500/300
Likewise, for the 2nd fraction, since 50 × 6 = 300,
81/50 = 81 × 6/50 × 6 = 486/300
Add the two like fractions:
500/300 + 486/300 = 500 + 486/300 = 986/300
986/300 simplified gives 493/150
So, 20/12 + 81/50 = 493/150
In mixed form: 343/150

MathStep (Works offline)

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