Subtract 8/72 from 15/7
1st number: 2 1/7, 2nd number: 8/72
15/7 - 8/72 is 128/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 7 × 72 = 504,
15/7 = 15 × 72/7 × 72 = 1080/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
8/72 = 8 × 7/72 × 7 = 56/504 - Subtract the two like fractions:
1080/504 - 56/504 = 1080 - 56/504 = 1024/504 - After reducing the fraction, the answer is 128/63
- In mixed form: 22/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/7-8/72 15/7-16/72 15/14-8/72 45/7-8/72 15/7-24/72 15/21-8/72 75/7-8/72 15/7-40/72 15/35-8/72 15/7-56/72 15/49-8/72