Add 72/3 and 25/21
1st number: 24 0/3, 2nd number: 1 4/21
72/3 + 25/21 is 529/21.
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,
72/3 = 72 × 7/3 × 7 = 504/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
25/21 = 25 × 1/21 × 1 = 25/21 - Add the two like fractions:
504/21 + 25/21 = 504 + 25/21 = 529/21 - So, 72/3 + 25/21 = 529/21
In mixed form: 254/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/3+50/21 72/6+25/21 72/3+25/42 72/3+75/21 72/9+25/21 72/3+25/63 72/15+25/21 72/21+25/21