Add 21/3 and 8/72
1st number: 7 0/3, 2nd number: 8/72
21/3 + 8/72 is 64/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 3 × 24 = 72,
21/3 = 21 × 24/3 × 24 = 504/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
8/72 = 8 × 1/72 × 1 = 8/72 - Add the two like fractions:
504/72 + 8/72 = 504 + 8/72 = 512/72 - 512/72 simplified gives 64/9
- So, 21/3 + 8/72 = 64/9
In mixed form: 71/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/3+8/72 21/3+16/72 21/6+8/72 63/3+8/72 21/3+24/72 21/9+8/72 21/3+40/72 21/15+8/72 21/3+56/72