Add 42/12 and 5/20
1st number: 3 6/12, 2nd number: 5/20
42/12 + 5/20 is 15/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
42/12 = 42 × 5/12 × 5 = 210/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
5/20 = 5 × 3/20 × 3 = 15/60 - Add the two like fractions:
210/60 + 15/60 = 210 + 15/60 = 225/60 - 225/60 simplified gives 15/4
- So, 42/12 + 5/20 = 15/4
In mixed form: 33/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/12+5/20 42/12+10/20 42/24+5/20 42/12+5/40 42/12+15/20 42/36+5/20 42/12+5/60 42/12+25/20 42/60+5/20 42/12+35/20 42/84+5/20