Add 20/7 and 12/20
1st number: 2 6/7, 2nd number: 12/20
20/7 + 12/20 is 121/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
20/7 = 20 × 20/7 × 20 = 400/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
12/20 = 12 × 7/20 × 7 = 84/140 - Add the two like fractions:
400/140 + 84/140 = 400 + 84/140 = 484/140 - 484/140 simplified gives 121/35
- So, 20/7 + 12/20 = 121/35
In mixed form: 316/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/7+12/20 20/7+24/20 20/14+12/20 20/7+12/40 60/7+12/20 20/7+36/20 20/21+12/20 20/7+12/60 20/7+60/20 20/35+12/20 20/7+84/20 20/49+12/20