Add 15/20 and 80/27, Solve 15/20 + 2 26/27 as a fraction

Add 15/20 and 80/27

1^st number: 15/20, 2^nd number: 2 26/27

15/20 + 80/27 is 401/108.

Find the least common denominator or LCM of the two denominators:
LCM of 20 and 27 is 540

Next, find the equivalent fraction of both fractional numbers with denominator 540
For the 1st fraction, since 20 × 27 = 540,
15/20 = 15 × 27/20 × 27 = 405/540
Likewise, for the 2nd fraction, since 27 × 20 = 540,
80/27 = 80 × 20/27 × 20 = 1600/540
Add the two like fractions:
405/540 + 1600/540 = 405 + 1600/540 = 2005/540
2005/540 simplified gives 401/108
So, 15/20 + 80/27 = 401/108
In mixed form: 377/108

MathStep (Works offline)

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