Add 42/3 and 81/12, Solve 14 0/3 + 6 9/12 as a fraction

Add 42/3 and 81/12

1^st number: 14 0/3, 2^nd number: 6 9/12

42/3 + 81/12 is 83/4.

Find the least common denominator or LCM of the two denominators:
LCM of 3 and 12 is 12

Next, find the equivalent fraction of both fractional numbers with denominator 12
For the 1st fraction, since 3 × 4 = 12,
42/3 = 42 × 4/3 × 4 = 168/12
Likewise, for the 2nd fraction, since 12 × 1 = 12,
81/12 = 81 × 1/12 × 1 = 81/12
Add the two like fractions:
168/12 + 81/12 = 168 + 81/12 = 249/12
249/12 simplified gives 83/4
So, 42/3 + 81/12 = 83/4
In mixed form: 203/4

MathStep (Works offline)

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