Add 63/21 and 20/18
1st number: 3 0/21, 2nd number: 1 2/18
63/21 + 20/18 is 37/9.
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,
63/21 = 63 × 6/21 × 6 = 378/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
20/18 = 20 × 7/18 × 7 = 140/126 - Add the two like fractions:
378/126 + 140/126 = 378 + 140/126 = 518/126 - 518/126 simplified gives 37/9
- So, 63/21 + 20/18 = 37/9
In mixed form: 41/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/21+40/18 63/42+20/18 63/21+20/36 63/21+60/18 63/21+20/54 63/21+20/90