Add 90/18 and 7/81
1st number: 5 0/18, 2nd number: 7/81
90/18 + 7/81 is 412/81.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 81 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 18 × 9 = 162,
90/18 = 90 × 9/18 × 9 = 810/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
7/81 = 7 × 2/81 × 2 = 14/162 - Add the two like fractions:
810/162 + 14/162 = 810 + 14/162 = 824/162 - 824/162 simplified gives 412/81
- So, 90/18 + 7/81 = 412/81
In mixed form: 57/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/18+14/81 90/36+7/81 90/18+21/81 90/54+7/81 90/18+35/81 90/18+49/81