Add 21/9 and 27/42
1st number: 2 3/9, 2nd number: 27/42
21/9 + 27/42 is 125/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 9 × 14 = 126,
21/9 = 21 × 14/9 × 14 = 294/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
27/42 = 27 × 3/42 × 3 = 81/126 - Add the two like fractions:
294/126 + 81/126 = 294 + 81/126 = 375/126 - 375/126 simplified gives 125/42
- So, 21/9 + 27/42 = 125/42
In mixed form: 241/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/9+27/42 21/9+54/42 21/18+27/42 21/9+27/84 63/9+27/42 21/9+81/42 21/27+27/42 21/45+27/42 21/63+27/42