Add 21/2 and 30/54
1st number: 10 1/2, 2nd number: 30/54
21/2 + 30/54 is 199/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 54 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 2 × 27 = 54,
21/2 = 21 × 27/2 × 27 = 567/54 - Likewise, for the 2nd fraction, since 54 × 1 = 54,
30/54 = 30 × 1/54 × 1 = 30/54 - Add the two like fractions:
567/54 + 30/54 = 567 + 30/54 = 597/54 - 597/54 simplified gives 199/18
- So, 21/2 + 30/54 = 199/18
In mixed form: 111/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2+30/54 21/2+60/54 21/4+30/54 63/2+30/54 21/2+90/54 21/6+30/54 21/10+30/54 21/14+30/54