Add 21/24 and 63/28
1st number: 21/24, 2nd number: 2 7/28
21/24 + 63/28 is 25/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 28 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 24 × 7 = 168,
21/24 = 21 × 7/24 × 7 = 147/168 - Likewise, for the 2nd fraction, since 28 × 6 = 168,
63/28 = 63 × 6/28 × 6 = 378/168 - Add the two like fractions:
147/168 + 378/168 = 147 + 378/168 = 525/168 - 525/168 simplified gives 25/8
- So, 21/24 + 63/28 = 25/8
In mixed form: 31/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/24+63/28 21/48+63/28 21/24+63/56 63/24+63/28 21/72+63/28 21/24+63/84