Add 42/14 and 21/4, Solve 3 0/14 + 5 1/4 as a fraction

Add 42/14 and 21/4

1^st number: 3 0/14, 2^nd number: 5 1/4

42/14 + 21/4 is 33/4.

Find the least common denominator or LCM of the two denominators:
LCM of 14 and 4 is 28

Next, find the equivalent fraction of both fractional numbers with denominator 28
For the 1st fraction, since 14 × 2 = 28,
42/14 = 42 × 2/14 × 2 = 84/28
Likewise, for the 2nd fraction, since 4 × 7 = 28,
21/4 = 21 × 7/4 × 7 = 147/28
Add the two like fractions:
84/28 + 147/28 = 84 + 147/28 = 231/28
231/28 simplified gives 33/4
So, 42/14 + 21/4 = 33/4
In mixed form: 81/4

MathStep (Works offline)

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