Add 18/2 and 90/81
1st number: 9 0/2, 2nd number: 1 9/81
18/2 + 90/81 is 91/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 81 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 2 × 81 = 162,
18/2 = 18 × 81/2 × 81 = 1458/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
90/81 = 90 × 2/81 × 2 = 180/162 - Add the two like fractions:
1458/162 + 180/162 = 1458 + 180/162 = 1638/162 - 1638/162 simplified gives 91/9
- So, 18/2 + 90/81 = 91/9
In mixed form: 101/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/2+90/81 18/4+90/81 54/2+90/81 18/6+90/81 90/2+90/81 18/10+90/81 18/14+90/81