Add 21/2 and 45/54
1st number: 10 1/2, 2nd number: 45/54
21/2 + 45/54 is 34/3.
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,
45/54 = 45 × 1/54 × 1 = 45/54 - Add the two like fractions:
567/54 + 45/54 = 567 + 45/54 = 612/54 - 612/54 simplified gives 34/3
- So, 21/2 + 45/54 = 34/3
In mixed form: 111/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2+45/54 21/2+90/54 21/4+45/54 63/2+45/54 21/6+45/54 21/10+45/54 21/14+45/54