Add 21/5 and 81/16
1st number: 4 1/5, 2nd number: 5 1/16
21/5 + 81/16 is 741/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 16 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 5 × 16 = 80,
21/5 = 21 × 16/5 × 16 = 336/80 - Likewise, for the 2nd fraction, since 16 × 5 = 80,
81/16 = 81 × 5/16 × 5 = 405/80 - Add the two like fractions:
336/80 + 405/80 = 336 + 405/80 = 741/80 - So, 21/5 + 81/16 = 741/80
In mixed form: 921/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/5+81/16 21/10+81/16 21/5+81/32 63/5+81/16 21/15+81/16 21/5+81/48 21/25+81/16 21/5+81/80 21/35+81/16