Add 20/28 and 15/27
20/28 + 15/27 is 80/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 27 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 28 × 27 = 756,
20/28 = 20 × 27/28 × 27 = 540/756 - Likewise, for the 2nd fraction, since 27 × 28 = 756,
15/27 = 15 × 28/27 × 28 = 420/756 - Add the two like fractions:
540/756 + 420/756 = 540 + 420/756 = 960/756 - 960/756 simplified gives 80/63
- So, 20/28 + 15/27 = 80/63
In mixed form: 117/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/28+15/27 20/28+30/27 20/56+15/27 20/28+15/54 60/28+15/27 20/28+45/27 20/84+15/27 20/28+15/81 20/28+75/27