Add 42/12 and 75/20
1st number: 3 6/12, 2nd number: 3 15/20
42/12 + 75/20 is 29/4.
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,
75/20 = 75 × 3/20 × 3 = 225/60 - Add the two like fractions:
210/60 + 225/60 = 210 + 225/60 = 435/60 - 435/60 simplified gives 29/4
- So, 42/12 + 75/20 = 29/4
In mixed form: 71/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/12+75/20 42/24+75/20 42/12+75/40 42/36+75/20 42/12+75/60 42/60+75/20 42/84+75/20