Add 21/42 and 42/3
1st number: 21/42, 2nd number: 14 0/3
21/42 + 42/3 is 29/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 3 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
21/42 = 21 × 1/42 × 1 = 21/42 - Likewise, for the 2nd fraction, since 3 × 14 = 42,
42/3 = 42 × 14/3 × 14 = 588/42 - Add the two like fractions:
21/42 + 588/42 = 21 + 588/42 = 609/42 - 609/42 simplified gives 29/2
- So, 21/42 + 42/3 = 29/2
In mixed form: 141/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 21/42+84/3 21/84+42/3 21/42+42/6 63/42+42/3 21/42+42/9 21/42+42/15 21/42+42/21