Subtract 8/7 from 15/72
1st number: 15/72, 2nd number: 1 1/7
15/72 - 8/7 is -157/168.
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,
15/72 = 15 × 7/72 × 7 = 105/504 - Likewise, for the 2nd fraction, since 7 × 72 = 504,
8/7 = 8 × 72/7 × 72 = 576/504 - Subtract the two like fractions:
105/504 - 576/504 = 105 - 576/504 = -471/504 - After reducing the fraction, the answer is -157/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/72-8/7 15/72-16/7 15/72-8/14 45/72-8/7 15/72-24/7 15/72-8/21 75/72-8/7 15/72-40/7 15/72-8/35 15/72-56/7 15/72-8/49