Add 8/54 and 9/21
8/54 + 9/21 is 109/189.
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,
8/54 = 8 × 7/54 × 7 = 56/378 - Likewise, for the 2nd fraction, since 21 × 18 = 378,
9/21 = 9 × 18/21 × 18 = 162/378 - Add the two like fractions:
56/378 + 162/378 = 56 + 162/378 = 218/378 - 218/378 simplified gives 109/189
- So, 8/54 + 9/21 = 109/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/54+9/21 8/54+18/21 8/54+9/42 24/54+9/21 8/54+27/21 8/54+9/63 40/54+9/21 8/54+45/21 56/54+9/21 8/54+63/21