Add 12/7 and 45/20
1st number: 1 5/7, 2nd number: 2 5/20
12/7 + 45/20 is 111/28.
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,
12/7 = 12 × 20/7 × 20 = 240/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
45/20 = 45 × 7/20 × 7 = 315/140 - Add the two like fractions:
240/140 + 315/140 = 240 + 315/140 = 555/140 - 555/140 simplified gives 111/28
- So, 12/7 + 45/20 = 111/28
In mixed form: 327/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/7+45/20 12/7+90/20 12/14+45/20 12/7+45/40 36/7+45/20 12/21+45/20 12/7+45/60 60/7+45/20 12/35+45/20 84/7+45/20 12/49+45/20