Add 4/12 and 81/80
1st number: 4/12, 2nd number: 1 1/80
4/12 + 81/80 is 323/240.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 12 × 20 = 240,
4/12 = 4 × 20/12 × 20 = 80/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
81/80 = 81 × 3/80 × 3 = 243/240 - Add the two like fractions:
80/240 + 243/240 = 80 + 243/240 = 323/240 - So, 4/12 + 81/80 = 323/240
In mixed form: 183/240
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/12+81/80 4/24+81/80 4/36+81/80 20/12+81/80 4/60+81/80 28/12+81/80 4/84+81/80