Add 8/54 and 21/15
1st number: 8/54, 2nd number: 1 6/15
8/54 + 21/15 is 209/135.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 15 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 54 × 5 = 270,
8/54 = 8 × 5/54 × 5 = 40/270 - Likewise, for the 2nd fraction, since 15 × 18 = 270,
21/15 = 21 × 18/15 × 18 = 378/270 - Add the two like fractions:
40/270 + 378/270 = 40 + 378/270 = 418/270 - 418/270 simplified gives 209/135
- So, 8/54 + 21/15 = 209/135
In mixed form: 174/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/54+21/15 8/54+42/15 8/54+21/30 24/54+21/15 8/54+63/15 8/54+21/45 40/54+21/15 8/54+21/75 56/54+21/15