Add 21/4 and 20/54
1st number: 5 1/4, 2nd number: 20/54
21/4 + 20/54 is 607/108.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 54 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 4 × 27 = 108,
21/4 = 21 × 27/4 × 27 = 567/108 - Likewise, for the 2nd fraction, since 54 × 2 = 108,
20/54 = 20 × 2/54 × 2 = 40/108 - Add the two like fractions:
567/108 + 40/108 = 567 + 40/108 = 607/108 - So, 21/4 + 20/54 = 607/108
In mixed form: 567/108
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/4+20/54 21/4+40/54 21/8+20/54 63/4+20/54 21/4+60/54 21/12+20/54 21/20+20/54 21/28+20/54