Add 21/14 and 28/7
1st number: 1 7/14, 2nd number: 4 0/7
21/14 + 28/7 is 11/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 7 is 14
Next, find the equivalent fraction of both fractional numbers with denominator 14 - For the 1st fraction, since 14 × 1 = 14,
21/14 = 21 × 1/14 × 1 = 21/14 - Likewise, for the 2nd fraction, since 7 × 2 = 14,
28/7 = 28 × 2/7 × 2 = 56/14 - Add the two like fractions:
21/14 + 56/14 = 21 + 56/14 = 77/14 - 77/14 simplified gives 11/2
- So, 21/14 + 28/7 = 11/2
In mixed form: 51/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/14+28/7 21/14+56/7 21/28+28/7 21/14+28/14 63/14+28/7 21/14+84/7 21/42+28/7 21/14+28/21 21/70+28/7 21/14+28/35 21/98+28/7 21/14+28/49