Add 21/28 and 4/27
21/28 + 4/27 is 97/108.
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,
4/27 = 4 × 28/27 × 28 = 112/756 - Add the two like fractions:
567/756 + 112/756 = 567 + 112/756 = 679/756 - 679/756 simplified gives 97/108
- So, 21/28 + 4/27 = 97/108
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/28+4/27 21/28+8/27 21/56+4/27 21/28+4/54 63/28+4/27 21/28+12/27 21/84+4/27 21/28+4/81 21/28+20/27 21/28+28/27