Add 9/21 and 5/72
9/21 + 5/72 is 251/504.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 21 × 24 = 504,
9/21 = 9 × 24/21 × 24 = 216/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
5/72 = 5 × 7/72 × 7 = 35/504 - Add the two like fractions:
216/504 + 35/504 = 216 + 35/504 = 251/504 - So, 9/21 + 5/72 = 251/504
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/21+5/72 9/21+10/72 9/42+5/72 27/21+5/72 9/21+15/72 9/63+5/72 45/21+5/72 9/21+25/72 63/21+5/72 9/21+35/72