Add 6/54 and 8/21
6/54 + 8/21 is 31/63.
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,
6/54 = 6 × 7/54 × 7 = 42/378 - Likewise, for the 2nd fraction, since 21 × 18 = 378,
8/21 = 8 × 18/21 × 18 = 144/378 - Add the two like fractions:
42/378 + 144/378 = 42 + 144/378 = 186/378 - 186/378 simplified gives 31/63
- So, 6/54 + 8/21 = 31/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/54+8/21 6/54+16/21 6/54+8/42 18/54+8/21 6/54+24/21 6/54+8/63 30/54+8/21 6/54+40/21 42/54+8/21 6/54+56/21