Add 8/5 and 16/21
1st number: 1 3/5, 2nd number: 16/21
8/5 + 16/21 is 248/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 5 × 21 = 105,
8/5 = 8 × 21/5 × 21 = 168/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
16/21 = 16 × 5/21 × 5 = 80/105 - Add the two like fractions:
168/105 + 80/105 = 168 + 80/105 = 248/105 - So, 8/5 + 16/21 = 248/105
In mixed form: 238/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/5+16/21 8/5+32/21 8/10+16/21 8/5+16/42 24/5+16/21 8/5+48/21 8/15+16/21 8/5+16/63 40/5+16/21 8/5+80/21 8/25+16/21 56/5+16/21 8/35+16/21