Subtract 15/72 from 20/7
1st number: 2 6/7, 2nd number: 15/72
20/7 - 15/72 is 445/168.
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,
20/7 = 20 × 72/7 × 72 = 1440/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
15/72 = 15 × 7/72 × 7 = 105/504 - Subtract the two like fractions:
1440/504 - 105/504 = 1440 - 105/504 = 1335/504 - After reducing the fraction, the answer is 445/168
- In mixed form: 2109/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/7-15/72 20/7-30/72 20/14-15/72 60/7-15/72 20/7-45/72 20/21-15/72 20/7-75/72 20/35-15/72 20/49-15/72