Add 12/3 and 10/42, Solve 4 0/3 + 10/42 as a fraction

Add 12/3 and 10/42

1^st number: 4 0/3, 2^nd number: 10/42

12/3 + 10/42 is 89/21.

Find the least common denominator or LCM of the two denominators:
LCM of 3 and 42 is 42

Next, find the equivalent fraction of both fractional numbers with denominator 42
For the 1st fraction, since 3 × 14 = 42,
12/3 = 12 × 14/3 × 14 = 168/42
Likewise, for the 2nd fraction, since 42 × 1 = 42,
10/42 = 10 × 1/42 × 1 = 10/42
Add the two like fractions:
168/42 + 10/42 = 168 + 10/42 = 178/42
178/42 simplified gives 89/21
So, 12/3 + 10/42 = 89/21
In mixed form: 45/21

MathStep (Works offline)

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