Add 35/20 and 42/12
1st number: 1 15/20, 2nd number: 3 6/12
35/20 + 42/12 is 21/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
35/20 = 35 × 3/20 × 3 = 105/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
42/12 = 42 × 5/12 × 5 = 210/60 - Add the two like fractions:
105/60 + 210/60 = 105 + 210/60 = 315/60 - 315/60 simplified gives 21/4
- So, 35/20 + 42/12 = 21/4
In mixed form: 51/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/20+42/12 35/20+84/12 35/40+42/12 35/20+42/24 35/60+42/12 35/20+42/36 35/20+42/60 35/20+42/84