Add 56/54 and 3/21
1st number: 1 2/54, 2nd number: 3/21
56/54 + 3/21 is 223/189.
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,
3/21 = 3 × 18/21 × 18 = 54/378 - Add the two like fractions:
392/378 + 54/378 = 392 + 54/378 = 446/378 - 446/378 simplified gives 223/189
- So, 56/54 + 3/21 = 223/189
In mixed form: 134/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/54+6/21 56/54+3/42 56/54+9/21 56/54+3/63 56/54+15/21