Add 42/4 and 21/3
1st number: 10 2/4, 2nd number: 7 0/3
42/4 + 21/3 is 35/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 3 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 4 × 3 = 12,
42/4 = 42 × 3/4 × 3 = 126/12 - Likewise, for the 2nd fraction, since 3 × 4 = 12,
21/3 = 21 × 4/3 × 4 = 84/12 - Add the two like fractions:
126/12 + 84/12 = 126 + 84/12 = 210/12 - 210/12 simplified gives 35/2
- So, 42/4 + 21/3 = 35/2
In mixed form: 171/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/4+21/3 42/4+42/3 42/8+21/3 42/4+21/6 42/4+63/3 42/12+21/3 42/4+21/9 42/20+21/3 42/4+21/15 42/28+21/3