Add 1/81 and 8/80
1/81 + 8/80 is 91/810.
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,
1/81 = 1 × 80/81 × 80 = 80/6480 - Likewise, for the 2nd fraction, since 80 × 81 = 6480,
8/80 = 8 × 81/80 × 81 = 648/6480 - Add the two like fractions:
80/6480 + 648/6480 = 80 + 648/6480 = 728/6480 - 728/6480 simplified gives 91/810
- So, 1/81 + 8/80 = 91/810
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/81+8/80 1/81+16/80 3/81+8/80 1/81+24/80 5/81+8/80 1/81+40/80 7/81+8/80 1/81+56/80