Add 16/3 and 72/21
1st number: 5 1/3, 2nd number: 3 9/21
16/3 + 72/21 is 184/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 21 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
16/3 = 16 × 7/3 × 7 = 112/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
72/21 = 72 × 1/21 × 1 = 72/21 - Add the two like fractions:
112/21 + 72/21 = 112 + 72/21 = 184/21 - So, 16/3 + 72/21 = 184/21
In mixed form: 816/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/3+72/21 16/6+72/21 16/3+72/42 48/3+72/21 16/9+72/21 16/3+72/63 80/3+72/21 16/15+72/21 16/21+72/21