Add 4/21 and 8/54
4/21 + 8/54 is 64/189.
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,
4/21 = 4 × 18/21 × 18 = 72/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
8/54 = 8 × 7/54 × 7 = 56/378 - Add the two like fractions:
72/378 + 56/378 = 72 + 56/378 = 128/378 - 128/378 simplified gives 64/189
- So, 4/21 + 8/54 = 64/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21+8/54 4/21+16/54 4/42+8/54 12/21+8/54 4/21+24/54 4/63+8/54 20/21+8/54 4/21+40/54 28/21+8/54 4/21+56/54