Add 60/80 and 20/81
60/80 + 20/81 is 323/324.
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,
20/81 = 20 × 80/81 × 80 = 1600/6480 - Add the two like fractions:
4860/6480 + 1600/6480 = 4860 + 1600/6480 = 6460/6480 - 6460/6480 simplified gives 323/324
- So, 60/80 + 20/81 = 323/324
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/80+40/81 60/80+60/81