Subtract 28/7 from 7/72
1st number: 7/72, 2nd number: 4 0/7
7/72 - 28/7 is -281/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 7 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 7 × 72 = 504,
28/7 = 28 × 72/7 × 72 = 2016/504 - Subtract the two like fractions:
49/504 - 2016/504 = 49 - 2016/504 = -1967/504 - After reducing the fraction, the answer is -281/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/72-28/7 7/72-56/7 7/72-28/14 21/72-28/7 7/72-84/7 7/72-28/21 35/72-28/7 7/72-28/35 49/72-28/7 7/72-28/49