Add 1/80 and 49/81
1/80 + 49/81 is 4001/6480.
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,
1/80 = 1 × 81/80 × 81 = 81/6480 - Likewise, for the 2nd fraction, since 81 × 80 = 6480,
49/81 = 49 × 80/81 × 80 = 3920/6480 - Add the two like fractions:
81/6480 + 3920/6480 = 81 + 3920/6480 = 4001/6480 - So, 1/80 + 49/81 = 4001/6480
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/80+49/81 1/80+98/81 3/80+49/81 5/80+49/81 7/80+49/81