Add 42/3 and 9/21
1st number: 14 0/3, 2nd number: 9/21
42/3 + 9/21 is 101/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 21 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
42/3 = 42 × 7/3 × 7 = 294/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
9/21 = 9 × 1/21 × 1 = 9/21 - Add the two like fractions:
294/21 + 9/21 = 294 + 9/21 = 303/21 - 303/21 simplified gives 101/7
- So, 42/3 + 9/21 = 101/7
In mixed form: 143/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/3+9/21 42/3+18/21 42/6+9/21 42/3+9/42 42/3+27/21 42/9+9/21 42/3+9/63 42/3+45/21 42/15+9/21 42/3+63/21 42/21+9/21