Add 12/20 and 3/7
12/20 + 3/7 is 36/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
12/20 = 12 × 7/20 × 7 = 84/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
3/7 = 3 × 20/7 × 20 = 60/140 - Add the two like fractions:
84/140 + 60/140 = 84 + 60/140 = 144/140 - 144/140 simplified gives 36/35
- So, 12/20 + 3/7 = 36/35
In mixed form: 11/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/20+3/7 12/20+6/7 12/40+3/7 12/20+3/14 36/20+3/7 12/20+9/7 12/60+3/7 12/20+3/21 60/20+3/7 12/20+15/7 12/20+3/35 84/20+3/7 12/20+21/7 12/20+3/49