Add 21/12 and 2/70
1st number: 1 9/12, 2nd number: 2/70
21/12 + 2/70 is 249/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 70 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 70 × 6 = 420,
2/70 = 2 × 6/70 × 6 = 12/420 - Add the two like fractions:
735/420 + 12/420 = 735 + 12/420 = 747/420 - 747/420 simplified gives 249/140
- So, 21/12 + 2/70 = 249/140
In mixed form: 1109/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/12+2/70 21/12+4/70 21/24+2/70 63/12+2/70 21/12+6/70 21/36+2/70 21/12+10/70 21/60+2/70 21/12+14/70 21/84+2/70