Subtract 6/7 from 3/72
3/72 - 6/7 is -137/168.
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,
3/72 = 3 × 7/72 × 7 = 21/504 - Likewise, for the 2nd fraction, since 7 × 72 = 504,
6/7 = 6 × 72/7 × 72 = 432/504 - Subtract the two like fractions:
21/504 - 432/504 = 21 - 432/504 = -411/504 - After reducing the fraction, the answer is -137/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/72-6/7 3/72-12/7 3/72-6/14 9/72-6/7 3/72-18/7 3/72-6/21 15/72-6/7 3/72-30/7 3/72-6/35 21/72-6/7 3/72-42/7 3/72-6/49