Add 60/80 and 30/81
60/80 + 30/81 is 121/108.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 81 is 6480
Next, find the equivalent fraction of both fractional numbers with denominator 6480 - For the 1st fraction, since 80 × 81 = 6480,
60/80 = 60 × 81/80 × 81 = 4860/6480 - Likewise, for the 2nd fraction, since 81 × 80 = 6480,
30/81 = 30 × 80/81 × 80 = 2400/6480 - Add the two like fractions:
4860/6480 + 2400/6480 = 4860 + 2400/6480 = 7260/6480 - 7260/6480 simplified gives 121/108
- So, 60/80 + 30/81 = 121/108
In mixed form: 113/108
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/80+60/81 60/80+90/81