Add 80/20 and 81/16
1st number: 4 0/20, 2nd number: 5 1/16
80/20 + 81/16 is 145/16.
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,
81/16 = 81 × 5/16 × 5 = 405/80 - Add the two like fractions:
320/80 + 405/80 = 320 + 405/80 = 725/80 - 725/80 simplified gives 145/16
- So, 80/20 + 81/16 = 145/16
In mixed form: 91/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/40+81/16 80/20+81/32 80/60+81/16 80/20+81/48 80/20+81/80