Add 25/30 and 28/81
25/30 + 28/81 is 191/162.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 81 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 30 × 27 = 810,
25/30 = 25 × 27/30 × 27 = 675/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
28/81 = 28 × 10/81 × 10 = 280/810 - Add the two like fractions:
675/810 + 280/810 = 675 + 280/810 = 955/810 - 955/810 simplified gives 191/162
- So, 25/30 + 28/81 = 191/162
In mixed form: 129/162
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/30+28/81 25/30+56/81 25/60+28/81 75/30+28/81 25/30+84/81 25/90+28/81