Add 30/75 and 20/12
1st number: 30/75, 2nd number: 1 8/12
30/75 + 20/12 is 31/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 12 is 300
Next, find the equivalent fraction of both fractional numbers with denominator 300 - For the 1st fraction, since 75 × 4 = 300,
30/75 = 30 × 4/75 × 4 = 120/300 - Likewise, for the 2nd fraction, since 12 × 25 = 300,
20/12 = 20 × 25/12 × 25 = 500/300 - Add the two like fractions:
120/300 + 500/300 = 120 + 500/300 = 620/300 - 620/300 simplified gives 31/15
- So, 30/75 + 20/12 = 31/15
In mixed form: 21/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/75+20/12 30/75+40/12 30/75+20/24 90/75+20/12 30/75+60/12 30/75+20/36 30/75+20/60 30/75+20/84