Add 54/80 and 21/16
1st number: 54/80, 2nd number: 1 5/16
54/80 + 21/16 is 159/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 16 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
54/80 = 54 × 1/80 × 1 = 54/80 - Likewise, for the 2nd fraction, since 16 × 5 = 80,
21/16 = 21 × 5/16 × 5 = 105/80 - Add the two like fractions:
54/80 + 105/80 = 54 + 105/80 = 159/80 - So, 54/80 + 21/16 = 159/80
In mixed form: 179/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/80+42/16 54/80+21/32 54/80+63/16 54/80+21/48 54/80+21/80