Add 1/54 and 80/21
1st number: 1/54, 2nd number: 3 17/21
1/54 + 80/21 is 1447/378.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 21 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
1/54 = 1 × 7/54 × 7 = 7/378 - Likewise, for the 2nd fraction, since 21 × 18 = 378,
80/21 = 80 × 18/21 × 18 = 1440/378 - Add the two like fractions:
7/378 + 1440/378 = 7 + 1440/378 = 1447/378 - So, 1/54 + 80/21 = 1447/378
In mixed form: 3313/378
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/54+80/21 1/54+80/42 3/54+80/21 1/54+80/63 5/54+80/21 7/54+80/21