Add 18/8 and 25/81
1st number: 2 2/8, 2nd number: 25/81
18/8 + 25/81 is 829/324.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 81 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 8 × 81 = 648,
18/8 = 18 × 81/8 × 81 = 1458/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
25/81 = 25 × 8/81 × 8 = 200/648 - Add the two like fractions:
1458/648 + 200/648 = 1458 + 200/648 = 1658/648 - 1658/648 simplified gives 829/324
- So, 18/8 + 25/81 = 829/324
In mixed form: 2181/324
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/8+25/81 18/8+50/81 18/16+25/81 54/8+25/81 18/8+75/81 18/24+25/81 90/8+25/81 18/40+25/81 18/56+25/81