Add 12/21 and 70/6
1st number: 12/21, 2nd number: 11 4/6
12/21 + 70/6 is 257/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
12/21 = 12 × 2/21 × 2 = 24/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
70/6 = 70 × 7/6 × 7 = 490/42 - Add the two like fractions:
24/42 + 490/42 = 24 + 490/42 = 514/42 - 514/42 simplified gives 257/21
- So, 12/21 + 70/6 = 257/21
In mixed form: 125/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21+70/6 12/42+70/6 12/21+70/12 36/21+70/6 12/63+70/6 12/21+70/18 60/21+70/6 12/21+70/30 84/21+70/6 12/21+70/42