Add 81/12 and 5/30
1st number: 6 9/12, 2nd number: 5/30
81/12 + 5/30 is 83/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
81/12 = 81 × 5/12 × 5 = 405/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
5/30 = 5 × 2/30 × 2 = 10/60 - Add the two like fractions:
405/60 + 10/60 = 405 + 10/60 = 415/60 - 415/60 simplified gives 83/12
- So, 81/12 + 5/30 = 83/12
In mixed form: 611/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/12+10/30 81/24+5/30 81/12+5/60 81/12+15/30 81/36+5/30 81/12+5/90 81/12+25/30 81/60+5/30 81/12+35/30 81/84+5/30