Add 28/80 and 10/81
28/80 + 10/81 is 767/1620.
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,
28/80 = 28 × 81/80 × 81 = 2268/6480 - Likewise, for the 2nd fraction, since 81 × 80 = 6480,
10/81 = 10 × 80/81 × 80 = 800/6480 - Add the two like fractions:
2268/6480 + 800/6480 = 2268 + 800/6480 = 3068/6480 - 3068/6480 simplified gives 767/1620
- So, 28/80 + 10/81 = 767/1620
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/80+10/81 28/80+20/81 84/80+10/81 28/80+30/81 28/80+50/81 28/80+70/81