Add 9/80 and 16/81
9/80 + 16/81 is 2009/6480.
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,
9/80 = 9 × 81/80 × 81 = 729/6480 - Likewise, for the 2nd fraction, since 81 × 80 = 6480,
16/81 = 16 × 80/81 × 80 = 1280/6480 - Add the two like fractions:
729/6480 + 1280/6480 = 729 + 1280/6480 = 2009/6480 - So, 9/80 + 16/81 = 2009/6480
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/80+16/81 9/80+32/81 27/80+16/81 9/80+48/81 45/80+16/81 9/80+80/81 63/80+16/81