Add 81/5 and 3/8
1st number: 16 1/5, 2nd number: 3/8
81/5 + 3/8 is 663/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 5 × 8 = 40,
81/5 = 81 × 8/5 × 8 = 648/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
3/8 = 3 × 5/8 × 5 = 15/40 - Add the two like fractions:
648/40 + 15/40 = 648 + 15/40 = 663/40 - So, 81/5 + 3/8 = 663/40
In mixed form: 1623/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/5+6/8 81/10+3/8 81/5+3/16 81/5+9/8 81/15+3/8 81/5+3/24 81/5+15/8 81/25+3/8 81/5+3/40 81/5+21/8 81/35+3/8 81/5+3/56