Add 15/54 and 21/36
15/54 + 21/36 is 31/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 36 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 54 × 2 = 108,
15/54 = 15 × 2/54 × 2 = 30/108 - Likewise, for the 2nd fraction, since 36 × 3 = 108,
21/36 = 21 × 3/36 × 3 = 63/108 - Add the two like fractions:
30/108 + 63/108 = 30 + 63/108 = 93/108 - 93/108 simplified gives 31/36
- So, 15/54 + 21/36 = 31/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/54+21/36 15/54+42/36 15/54+21/72 45/54+21/36 15/54+63/36 75/54+21/36