Add 24/42 and 21/20
1st number: 24/42, 2nd number: 1 1/20
24/42 + 21/20 is 227/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 42 × 10 = 420,
24/42 = 24 × 10/42 × 10 = 240/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
21/20 = 21 × 21/20 × 21 = 441/420 - Add the two like fractions:
240/420 + 441/420 = 240 + 441/420 = 681/420 - 681/420 simplified gives 227/140
- So, 24/42 + 21/20 = 227/140
In mixed form: 187/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/42+21/20 24/42+42/20 24/84+21/20 24/42+21/40 72/42+21/20 24/42+63/20 24/42+21/60