Add 7/21 and 14/5
1st number: 7/21, 2nd number: 2 4/5
7/21 + 14/5 is 47/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 5 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
7/21 = 7 × 5/21 × 5 = 35/105 - Likewise, for the 2nd fraction, since 5 × 21 = 105,
14/5 = 14 × 21/5 × 21 = 294/105 - Add the two like fractions:
35/105 + 294/105 = 35 + 294/105 = 329/105 - 329/105 simplified gives 47/15
- So, 7/21 + 14/5 = 47/15
In mixed form: 32/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/21+14/5 7/21+28/5 7/42+14/5 7/21+14/10 7/21+42/5 7/63+14/5 7/21+14/15 35/21+14/5 7/21+70/5 7/21+14/25 49/21+14/5 7/21+98/5 7/21+14/35