Add 8/20 and 81/12
1st number: 8/20, 2nd number: 6 9/12
8/20 + 81/12 is 143/20.
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,
8/20 = 8 × 3/20 × 3 = 24/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
81/12 = 81 × 5/12 × 5 = 405/60 - Add the two like fractions:
24/60 + 405/60 = 24 + 405/60 = 429/60 - 429/60 simplified gives 143/20
- So, 8/20 + 81/12 = 143/20
In mixed form: 73/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/20+81/12 8/40+81/12 8/20+81/24 24/20+81/12 8/60+81/12 8/20+81/36 40/20+81/12 8/20+81/60 56/20+81/12 8/20+81/84