Add 21/12 and 4/35
1st number: 1 9/12, 2nd number: 4/35
21/12 + 4/35 is 261/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 35 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 12 × 35 = 420,
21/12 = 21 × 35/12 × 35 = 735/420 - Likewise, for the 2nd fraction, since 35 × 12 = 420,
4/35 = 4 × 12/35 × 12 = 48/420 - Add the two like fractions:
735/420 + 48/420 = 735 + 48/420 = 783/420 - 783/420 simplified gives 261/140
- So, 21/12 + 4/35 = 261/140
In mixed form: 1121/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/12+4/35 21/12+8/35 21/24+4/35 21/12+4/70 63/12+4/35 21/12+12/35 21/36+4/35 21/12+20/35 21/60+4/35 21/12+28/35 21/84+4/35