Add 54/80 and 21/4
1st number: 54/80, 2nd number: 5 1/4
54/80 + 21/4 is 237/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 4 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 4 × 20 = 80,
21/4 = 21 × 20/4 × 20 = 420/80 - Add the two like fractions:
54/80 + 420/80 = 54 + 420/80 = 474/80 - 474/80 simplified gives 237/40
- So, 54/80 + 21/4 = 237/40
In mixed form: 537/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/80+42/4 54/80+21/8 54/80+63/4 54/80+21/12 54/80+21/20 54/80+21/28