Add 56/70 and 9/12
56/70 + 9/12 is 31/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 12 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 70 × 6 = 420,
56/70 = 56 × 6/70 × 6 = 336/420 - Likewise, for the 2nd fraction, since 12 × 35 = 420,
9/12 = 9 × 35/12 × 35 = 315/420 - Add the two like fractions:
336/420 + 315/420 = 336 + 315/420 = 651/420 - 651/420 simplified gives 31/20
- So, 56/70 + 9/12 = 31/20
In mixed form: 111/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/70+18/12 56/70+9/24 56/70+27/12 56/70+9/36 56/70+45/12 56/70+9/60 56/70+63/12 56/70+9/84