Add 21/28 and 28/14
1st number: 21/28, 2nd number: 2 0/14
21/28 + 28/14 is 11/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 14 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 28 × 1 = 28,
21/28 = 21 × 1/28 × 1 = 21/28 - Likewise, for the 2nd fraction, since 14 × 2 = 28,
28/14 = 28 × 2/14 × 2 = 56/28 - Add the two like fractions:
21/28 + 56/28 = 21 + 56/28 = 77/28 - 77/28 simplified gives 11/4
- So, 21/28 + 28/14 = 11/4
In mixed form: 23/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/28+28/14 21/28+56/14 21/56+28/14 63/28+28/14 21/28+84/14 21/84+28/14 21/28+28/42 21/28+28/70 21/28+28/98