Add 50/54 and 9/21
50/54 + 9/21 is 256/189.
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,
50/54 = 50 × 7/54 × 7 = 350/378 - Likewise, for the 2nd fraction, since 21 × 18 = 378,
9/21 = 9 × 18/21 × 18 = 162/378 - Add the two like fractions:
350/378 + 162/378 = 350 + 162/378 = 512/378 - 512/378 simplified gives 256/189
- So, 50/54 + 9/21 = 256/189
In mixed form: 167/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/54+18/21 50/54+9/42 50/54+27/21 50/54+9/63 50/54+45/21 50/54+63/21