Add 18/81 and 30/45
18/81 + 30/45 is 8/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 45 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 81 × 5 = 405,
18/81 = 18 × 5/81 × 5 = 90/405 - Likewise, for the 2nd fraction, since 45 × 9 = 405,
30/45 = 30 × 9/45 × 9 = 270/405 - Add the two like fractions:
90/405 + 270/405 = 90 + 270/405 = 360/405 - 360/405 simplified gives 8/9
- So, 18/81 + 30/45 = 8/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/81+30/45 18/81+60/45 18/81+30/90 54/81+30/45 18/81+90/45 90/81+30/45