Add 21/27 and 63/54
1st number: 21/27, 2nd number: 1 9/54
21/27 + 63/54 is 35/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 54 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 27 × 2 = 54,
21/27 = 21 × 2/27 × 2 = 42/54 - Likewise, for the 2nd fraction, since 54 × 1 = 54,
63/54 = 63 × 1/54 × 1 = 63/54 - Add the two like fractions:
42/54 + 63/54 = 42 + 63/54 = 105/54 - 105/54 simplified gives 35/18
- So, 21/27 + 63/54 = 35/18
In mixed form: 117/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/27+63/54 21/54+63/54 63/27+63/54 21/81+63/54