Add 3/80 and 30/81
3/80 + 30/81 is 881/2160.
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,
3/80 = 3 × 81/80 × 81 = 243/6480 - Likewise, for the 2nd fraction, since 81 × 80 = 6480,
30/81 = 30 × 80/81 × 80 = 2400/6480 - Add the two like fractions:
243/6480 + 2400/6480 = 243 + 2400/6480 = 2643/6480 - 2643/6480 simplified gives 881/2160
- So, 3/80 + 30/81 = 881/2160
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/80+30/81 3/80+60/81 9/80+30/81 3/80+90/81 15/80+30/81 21/80+30/81