Subtract 63/84 from 7/72
7/72 - 63/84 is -47/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 84 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
7/72 = 7 × 7/72 × 7 = 49/504 - Likewise, for the 2nd fraction, since 84 × 6 = 504,
63/84 = 63 × 6/84 × 6 = 378/504 - Subtract the two like fractions:
49/504 - 378/504 = 49 - 378/504 = -329/504 - After reducing the fraction, the answer is -47/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/72-63/84 21/72-63/84 35/72-63/84 49/72-63/84