Add 27/8 and 4/81, Solve 3 3/8 + 4/81 as a fraction

Add 27/8 and 4/81

1^st number: 3 3/8, 2^nd number: 4/81

27/8 + 4/81 is 2219/648.

Find the least common denominator or LCM of the two denominators:
LCM of 8 and 81 is 648

Next, find the equivalent fraction of both fractional numbers with denominator 648
For the 1st fraction, since 8 × 81 = 648,
27/8 = 27 × 81/8 × 81 = 2187/648
Likewise, for the 2nd fraction, since 81 × 8 = 648,
4/81 = 4 × 8/81 × 8 = 32/648
Add the two like fractions:
2187/648 + 32/648 = 2187 + 32/648 = 2219/648
So, 27/8 + 4/81 = 2219/648
In mixed form: 3275/648

MathStep (Works offline)

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