Add 24/42 and 21/18
1st number: 24/42, 2nd number: 1 3/18
24/42 + 21/18 is 73/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
24/42 = 24 × 3/42 × 3 = 72/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
21/18 = 21 × 7/18 × 7 = 147/126 - Add the two like fractions:
72/126 + 147/126 = 72 + 147/126 = 219/126 - 219/126 simplified gives 73/42
- So, 24/42 + 21/18 = 73/42
In mixed form: 131/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/42+21/18 24/42+42/18 24/84+21/18 24/42+21/36 72/42+21/18 24/42+63/18 24/42+21/54 24/42+21/90