Add 5/21 and 8/54
5/21 + 8/54 is 73/189.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 21 × 18 = 378,
5/21 = 5 × 18/21 × 18 = 90/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
8/54 = 8 × 7/54 × 7 = 56/378 - Add the two like fractions:
90/378 + 56/378 = 90 + 56/378 = 146/378 - 146/378 simplified gives 73/189
- So, 5/21 + 8/54 = 73/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21+8/54 5/21+16/54 5/42+8/54 15/21+8/54 5/21+24/54 5/63+8/54 25/21+8/54 5/21+40/54 35/21+8/54 5/21+56/54