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