Add 21/14 and 7/21
1st number: 1 7/14, 2nd number: 7/21
21/14 + 7/21 is 11/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 14 × 3 = 42,
21/14 = 21 × 3/14 × 3 = 63/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
7/21 = 7 × 2/21 × 2 = 14/42 - Add the two like fractions:
63/42 + 14/42 = 63 + 14/42 = 77/42 - 77/42 simplified gives 11/6
- So, 21/14 + 7/21 = 11/6
In mixed form: 15/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/14+7/21 21/14+14/21 21/28+7/21 21/14+7/42 63/14+7/21 21/42+7/21 21/14+7/63 21/14+35/21 21/70+7/21 21/14+49/21 21/98+7/21