Add 8/7 and 9/54, Solve 1 1/7 + 9/54 as a fraction

Add 8/7 and 9/54

1^st number: 1 1/7, 2^nd number: 9/54

8/7 + 9/54 is 55/42.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 54 is 378

Next, find the equivalent fraction of both fractional numbers with denominator 378
For the 1st fraction, since 7 × 54 = 378,
8/7 = 8 × 54/7 × 54 = 432/378
Likewise, for the 2nd fraction, since 54 × 7 = 378,
9/54 = 9 × 7/54 × 7 = 63/378
Add the two like fractions:
432/378 + 63/378 = 432 + 63/378 = 495/378
495/378 simplified gives 55/42
So, 8/7 + 9/54 = 55/42
In mixed form: 113/42

MathStep (Works offline)

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