Add 7/21 and 14/7
1st number: 7/21, 2nd number: 2 0/7
7/21 + 14/7 is 7/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 7 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 21 × 1 = 21,
7/21 = 7 × 1/21 × 1 = 7/21 - Likewise, for the 2nd fraction, since 7 × 3 = 21,
14/7 = 14 × 3/7 × 3 = 42/21 - Add the two like fractions:
7/21 + 42/21 = 7 + 42/21 = 49/21 - 49/21 simplified gives 7/3
- So, 7/21 + 14/7 = 7/3
In mixed form: 21/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/21+14/7 7/21+28/7 7/42+14/7 7/21+42/7 7/63+14/7 7/21+14/21 35/21+14/7 7/21+70/7 7/21+14/35 49/21+14/7 7/21+98/7 7/21+14/49