Add 18/27 and 28/20
1st number: 18/27, 2nd number: 1 8/20
18/27 + 28/20 is 31/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 20 is 540
Next, find the equivalent fraction of both fractional numbers with denominator 540 - For the 1st fraction, since 27 × 20 = 540,
18/27 = 18 × 20/27 × 20 = 360/540 - Likewise, for the 2nd fraction, since 20 × 27 = 540,
28/20 = 28 × 27/20 × 27 = 756/540 - Add the two like fractions:
360/540 + 756/540 = 360 + 756/540 = 1116/540 - 1116/540 simplified gives 31/15
- So, 18/27 + 28/20 = 31/15
In mixed form: 21/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/27+28/20 18/27+56/20 18/54+28/20 18/27+28/40 54/27+28/20 18/27+84/20 18/81+28/20 18/27+28/60 90/27+28/20