Add 63/21 and 81/24
1st number: 3 0/21, 2nd number: 3 9/24
63/21 + 81/24 is 51/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
63/21 = 63 × 8/21 × 8 = 504/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
81/24 = 81 × 7/24 × 7 = 567/168 - Add the two like fractions:
504/168 + 567/168 = 504 + 567/168 = 1071/168 - 1071/168 simplified gives 51/8
- So, 63/21 + 81/24 = 51/8
In mixed form: 63/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/42+81/24 63/21+81/48 63/21+81/72