Add 5/21 and 36/18
1st number: 5/21, 2nd number: 2 0/18
5/21 + 36/18 is 47/21.
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,
36/18 = 36 × 7/18 × 7 = 252/126 - Add the two like fractions:
30/126 + 252/126 = 30 + 252/126 = 282/126 - 282/126 simplified gives 47/21
- So, 5/21 + 36/18 = 47/21
In mixed form: 25/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21+36/18 5/21+72/18 5/42+36/18 15/21+36/18 5/63+36/18 5/21+36/54 25/21+36/18 5/21+36/90 35/21+36/18