Subtract 15/56 from 7/72
7/72 - 15/56 is -43/252.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 56 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 56 × 9 = 504,
15/56 = 15 × 9/56 × 9 = 135/504 - Subtract the two like fractions:
49/504 - 135/504 = 49 - 135/504 = -86/504 - After reducing the fraction, the answer is -43/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/72-15/56 7/72-30/56 21/72-15/56 7/72-45/56 35/72-15/56 7/72-75/56 49/72-15/56