Add 27/80 and 15/9, Solve 27/80 + 1 6/9 as a fraction

Add 27/80 and 15/9

1^st number: 27/80, 2^nd number: 1 6/9

27/80 + 15/9 is 481/240.

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 9 is 720

Next, find the equivalent fraction of both fractional numbers with denominator 720
For the 1st fraction, since 80 × 9 = 720,
27/80 = 27 × 9/80 × 9 = 243/720
Likewise, for the 2nd fraction, since 9 × 80 = 720,
15/9 = 15 × 80/9 × 80 = 1200/720
Add the two like fractions:
243/720 + 1200/720 = 243 + 1200/720 = 1443/720
1443/720 simplified gives 481/240
So, 27/80 + 15/9 = 481/240
In mixed form: 21/240

MathStep (Works offline)

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