Add 5/81 and 4/80
5/81 + 4/80 is 181/1620.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 80 is 6480
Next, find the equivalent fraction of both fractional numbers with denominator 6480 - For the 1st fraction, since 81 × 80 = 6480,
5/81 = 5 × 80/81 × 80 = 400/6480 - Likewise, for the 2nd fraction, since 80 × 81 = 6480,
4/80 = 4 × 81/80 × 81 = 324/6480 - Add the two like fractions:
400/6480 + 324/6480 = 400 + 324/6480 = 724/6480 - 724/6480 simplified gives 181/1620
- So, 5/81 + 4/80 = 181/1620
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/81+4/80 5/81+8/80 15/81+4/80 5/81+12/80 25/81+4/80 5/81+20/80 35/81+4/80 5/81+28/80