Add 81/24 and 21/7
1st number: 3 9/24, 2nd number: 3 0/7
81/24 + 21/7 is 51/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 7 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 24 × 7 = 168,
81/24 = 81 × 7/24 × 7 = 567/168 - Likewise, for the 2nd fraction, since 7 × 24 = 168,
21/7 = 21 × 24/7 × 24 = 504/168 - Add the two like fractions:
567/168 + 504/168 = 567 + 504/168 = 1071/168 - 1071/168 simplified gives 51/8
- So, 81/24 + 21/7 = 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: 81/24+42/7 81/48+21/7 81/24+21/14 81/24+63/7 81/72+21/7 81/24+21/35 81/24+21/49