Add 20/27 and 18/28
20/27 + 18/28 is 523/378.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 28 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 27 × 28 = 756,
20/27 = 20 × 28/27 × 28 = 560/756 - Likewise, for the 2nd fraction, since 28 × 27 = 756,
18/28 = 18 × 27/28 × 27 = 486/756 - Add the two like fractions:
560/756 + 486/756 = 560 + 486/756 = 1046/756 - 1046/756 simplified gives 523/378
- So, 20/27 + 18/28 = 523/378
In mixed form: 1145/378
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/27+18/28 20/27+36/28 20/54+18/28 20/27+18/56 60/27+18/28 20/27+54/28 20/81+18/28 20/27+18/84 20/27+90/28