Add 21/7 and 5/8
1st number: 3 0/7, 2nd number: 5/8
21/7 + 5/8 is 29/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 8 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 7 × 8 = 56,
21/7 = 21 × 8/7 × 8 = 168/56 - Likewise, for the 2nd fraction, since 8 × 7 = 56,
5/8 = 5 × 7/8 × 7 = 35/56 - Add the two like fractions:
168/56 + 35/56 = 168 + 35/56 = 203/56 - 203/56 simplified gives 29/8
- So, 21/7 + 5/8 = 29/8
In mixed form: 35/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/7+5/8 21/7+10/8 21/14+5/8 21/7+5/16 63/7+5/8 21/7+15/8 21/7+5/24 21/7+25/8 21/35+5/8 21/7+5/40 21/7+35/8 21/49+5/8 21/7+5/56