Add 80/20 and 21/16
1st number: 4 0/20, 2nd number: 1 5/16
80/20 + 21/16 is 85/16.
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,
80/20 = 80 × 4/20 × 4 = 320/80 - Likewise, for the 2nd fraction, since 16 × 5 = 80,
21/16 = 21 × 5/16 × 5 = 105/80 - Add the two like fractions:
320/80 + 105/80 = 320 + 105/80 = 425/80 - 425/80 simplified gives 85/16
- So, 80/20 + 21/16 = 85/16
In mixed form: 55/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/20+42/16 80/40+21/16 80/20+21/32 80/20+63/16 80/60+21/16 80/20+21/48 80/20+21/80