Add 21/8 and 24/7
1st number: 2 5/8, 2nd number: 3 3/7
21/8 + 24/7 is 339/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 7 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 8 × 7 = 56,
21/8 = 21 × 7/8 × 7 = 147/56 - Likewise, for the 2nd fraction, since 7 × 8 = 56,
24/7 = 24 × 8/7 × 8 = 192/56 - Add the two like fractions:
147/56 + 192/56 = 147 + 192/56 = 339/56 - So, 21/8 + 24/7 = 339/56
In mixed form: 63/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/8+24/7 21/8+48/7 21/16+24/7 21/8+24/14 63/8+24/7 21/8+72/7 21/24+24/7 21/8+24/21 21/40+24/7 21/8+24/35 21/56+24/7 21/8+24/49