Add 3/8 and 21/72
3/8 + 21/72 is 2/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 8 × 9 = 72,
3/8 = 3 × 9/8 × 9 = 27/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
21/72 = 21 × 1/72 × 1 = 21/72 - Add the two like fractions:
27/72 + 21/72 = 27 + 21/72 = 48/72 - 48/72 simplified gives 2/3
- So, 3/8 + 21/72 = 2/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/8+21/72 3/8+42/72 3/16+21/72 9/8+21/72 3/8+63/72 3/24+21/72 15/8+21/72 3/40+21/72 21/8+21/72 3/56+21/72