Add 56/54 and 9/21
1st number: 1 2/54, 2nd number: 9/21
56/54 + 9/21 is 277/189.
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,
56/54 = 56 × 7/54 × 7 = 392/378 - Likewise, for the 2nd fraction, since 21 × 18 = 378,
9/21 = 9 × 18/21 × 18 = 162/378 - Add the two like fractions:
392/378 + 162/378 = 392 + 162/378 = 554/378 - 554/378 simplified gives 277/189
- So, 56/54 + 9/21 = 277/189
In mixed form: 188/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/54+18/21 56/54+9/42 56/54+27/21 56/54+9/63 56/54+45/21 56/54+63/21