Add 21/14 and 7/54, Solve 1 7/14 + 7/54 as a fraction

Add 21/14 and 7/54

1^st number: 1 7/14, 2^nd number: 7/54

21/14 + 7/54 is 44/27.

Find the least common denominator or LCM of the two denominators:
LCM of 14 and 54 is 378

Next, find the equivalent fraction of both fractional numbers with denominator 378
For the 1st fraction, since 14 × 27 = 378,
21/14 = 21 × 27/14 × 27 = 567/378
Likewise, for the 2nd fraction, since 54 × 7 = 378,
7/54 = 7 × 7/54 × 7 = 49/378
Add the two like fractions:
567/378 + 49/378 = 567 + 49/378 = 616/378
616/378 simplified gives 44/27
So, 21/14 + 7/54 = 44/27
In mixed form: 117/27

MathStep (Works offline)

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