Add 5/21 and 14/18
5/21 + 14/18 is 64/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 21 × 6 = 126,
5/21 = 5 × 6/21 × 6 = 30/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
14/18 = 14 × 7/18 × 7 = 98/126 - Add the two like fractions:
30/126 + 98/126 = 30 + 98/126 = 128/126 - 128/126 simplified gives 64/63
- So, 5/21 + 14/18 = 64/63
In mixed form: 11/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21+14/18 5/21+28/18 5/42+14/18 5/21+14/36 15/21+14/18 5/21+42/18 5/63+14/18 5/21+14/54 25/21+14/18 5/21+70/18 5/21+14/90 35/21+14/18 5/21+98/18