Subtract 5/72 from 9/21
9/21 - 5/72 is 181/504.
Steps for subtracting 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 - Subtract the two like fractions:
216/504 - 35/504 = 216 - 35/504 = 181/504
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