Add 8/18 and 21/72
8/18 + 21/72 is 53/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 18 × 4 = 72,
8/18 = 8 × 4/18 × 4 = 32/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
21/72 = 21 × 1/72 × 1 = 21/72 - Add the two like fractions:
32/72 + 21/72 = 32 + 21/72 = 53/72 - So, 8/18 + 21/72 = 53/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/18+21/72 8/18+42/72 8/36+21/72 24/18+21/72 8/18+63/72 8/54+21/72 40/18+21/72 8/90+21/72 56/18+21/72