Add 21/28 and 24/27
21/28 + 24/27 is 59/36.
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,
21/28 = 21 × 27/28 × 27 = 567/756 - Likewise, for the 2nd fraction, since 27 × 28 = 756,
24/27 = 24 × 28/27 × 28 = 672/756 - Add the two like fractions:
567/756 + 672/756 = 567 + 672/756 = 1239/756 - 1239/756 simplified gives 59/36
- So, 21/28 + 24/27 = 59/36
In mixed form: 123/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/28+24/27 21/28+48/27 21/56+24/27 21/28+24/54 63/28+24/27 21/28+72/27 21/84+24/27 21/28+24/81