Add 12/81 and 28/10
1st number: 12/81, 2nd number: 2 8/10
12/81 + 28/10 is 398/135.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 10 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 81 × 10 = 810,
12/81 = 12 × 10/81 × 10 = 120/810 - Likewise, for the 2nd fraction, since 10 × 81 = 810,
28/10 = 28 × 81/10 × 81 = 2268/810 - Add the two like fractions:
120/810 + 2268/810 = 120 + 2268/810 = 2388/810 - 2388/810 simplified gives 398/135
- So, 12/81 + 28/10 = 398/135
In mixed form: 2128/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/81+28/10 12/81+56/10 12/81+28/20 36/81+28/10 12/81+84/10 12/81+28/30 60/81+28/10 12/81+28/50 84/81+28/10 12/81+28/70