Add 3/12 and 63/70
3/12 + 63/70 is 23/20.
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,
3/12 = 3 × 35/12 × 35 = 105/420 - Likewise, for the 2nd fraction, since 70 × 6 = 420,
63/70 = 63 × 6/70 × 6 = 378/420 - Add the two like fractions:
105/420 + 378/420 = 105 + 378/420 = 483/420 - 483/420 simplified gives 23/20
- So, 3/12 + 63/70 = 23/20
In mixed form: 13/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/12+63/70 3/24+63/70 9/12+63/70 3/36+63/70 15/12+63/70 3/60+63/70 21/12+63/70 3/84+63/70