Add 21/54 and 8/36
21/54 + 8/36 is 11/18.
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,
21/54 = 21 × 2/54 × 2 = 42/108 - Likewise, for the 2nd fraction, since 36 × 3 = 108,
8/36 = 8 × 3/36 × 3 = 24/108 - Add the two like fractions:
42/108 + 24/108 = 42 + 24/108 = 66/108 - 66/108 simplified gives 11/18
- So, 21/54 + 8/36 = 11/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/54+8/36 21/54+16/36 21/54+8/72 63/54+8/36 21/54+24/36 21/54+40/36 21/54+56/36