Add 3/8 and 21/7
1st number: 3/8, 2nd number: 3 0/7
3/8 + 21/7 is 27/8.
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,
3/8 = 3 × 7/8 × 7 = 21/56 - Likewise, for the 2nd fraction, since 7 × 8 = 56,
21/7 = 21 × 8/7 × 8 = 168/56 - Add the two like fractions:
21/56 + 168/56 = 21 + 168/56 = 189/56 - 189/56 simplified gives 27/8
- So, 3/8 + 21/7 = 27/8
In mixed form: 33/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/8+21/7 3/8+42/7 3/16+21/7 3/8+21/14 9/8+21/7 3/8+63/7 3/24+21/7 15/8+21/7 3/40+21/7 3/8+21/35 21/8+21/7 3/56+21/7 3/8+21/49