Add 8/20 and 21/16
1st number: 8/20, 2nd number: 1 5/16
8/20 + 21/16 is 137/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 16 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 20 × 4 = 80,
8/20 = 8 × 4/20 × 4 = 32/80 - Likewise, for the 2nd fraction, since 16 × 5 = 80,
21/16 = 21 × 5/16 × 5 = 105/80 - Add the two like fractions:
32/80 + 105/80 = 32 + 105/80 = 137/80 - So, 8/20 + 21/16 = 137/80
In mixed form: 157/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/20+21/16 8/20+42/16 8/40+21/16 8/20+21/32 24/20+21/16 8/20+63/16 8/60+21/16 8/20+21/48 40/20+21/16 8/20+21/80 56/20+21/16