Subtract 28/14 from 7/72
1st number: 7/72, 2nd number: 2 0/14
7/72 - 28/14 is -137/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 14 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 14 × 36 = 504,
28/14 = 28 × 36/14 × 36 = 1008/504 - Subtract the two like fractions:
49/504 - 1008/504 = 49 - 1008/504 = -959/504 - After reducing the fraction, the answer is -137/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/72-28/14 7/72-56/14 21/72-28/14 7/72-84/14 7/72-28/42 35/72-28/14 7/72-28/70 49/72-28/14 7/72-28/98