Add 14/21 and 28/4, Solve 14/21 + 7 0/4 as a fraction

Add 14/21 and 28/4

1^st number: 14/21, 2^nd number: 7 0/4

14/21 + 28/4 is 23/3.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 4 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 21 × 4 = 84,
14/21 = 14 × 4/21 × 4 = 56/84
Likewise, for the 2nd fraction, since 4 × 21 = 84,
28/4 = 28 × 21/4 × 21 = 588/84
Add the two like fractions:
56/84 + 588/84 = 56 + 588/84 = 644/84
644/84 simplified gives 23/3
So, 14/21 + 28/4 = 23/3
In mixed form: 72/3

MathStep (Works offline)

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