Subtract 49/72 from 9/42
9/42 - 49/72 is -235/504.
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,
49/72 = 49 × 7/72 × 7 = 343/504 - Subtract the two like fractions:
108/504 - 343/504 = 108 - 343/504 = -235/504
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/42-49/72 9/42-98/72 9/84-49/72 27/42-49/72 45/42-49/72 63/42-49/72