Add 21/15 and 6/54
1st number: 1 6/15, 2nd number: 6/54
21/15 + 6/54 is 68/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 54 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 15 × 18 = 270,
21/15 = 21 × 18/15 × 18 = 378/270 - Likewise, for the 2nd fraction, since 54 × 5 = 270,
6/54 = 6 × 5/54 × 5 = 30/270 - Add the two like fractions:
378/270 + 30/270 = 378 + 30/270 = 408/270 - 408/270 simplified gives 68/45
- So, 21/15 + 6/54 = 68/45
In mixed form: 123/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/15+6/54 21/15+12/54 21/30+6/54 63/15+6/54 21/15+18/54 21/45+6/54 21/15+30/54 21/75+6/54 21/15+42/54