Add 12/80 and 12/81
12/80 + 12/81 is 161/540.
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,
12/80 = 12 × 81/80 × 81 = 972/6480 - Likewise, for the 2nd fraction, since 81 × 80 = 6480,
12/81 = 12 × 80/81 × 80 = 960/6480 - Add the two like fractions:
972/6480 + 960/6480 = 972 + 960/6480 = 1932/6480 - 1932/6480 simplified gives 161/540
- So, 12/80 + 12/81 = 161/540
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/80+12/81 12/80+24/81 36/80+12/81 12/80+36/81 60/80+12/81 12/80+60/81 84/80+12/81 12/80+84/81