Subtract 5/72 from 9/42
9/42 - 5/72 is 73/504.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 42 × 12 = 504,
9/42 = 9 × 12/42 × 12 = 108/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
5/72 = 5 × 7/72 × 7 = 35/504 - Subtract the two like fractions:
108/504 - 35/504 = 108 - 35/504 = 73/504
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/42-5/72 9/42-10/72 9/84-5/72 27/42-5/72 9/42-15/72 45/42-5/72 9/42-25/72 63/42-5/72 9/42-35/72