Subtract 50/81 from 5/7
5/7 - 50/81 is 55/567.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 7 × 81 = 567,
5/7 = 5 × 81/7 × 81 = 405/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
50/81 = 50 × 7/81 × 7 = 350/567 - Subtract the two like fractions:
405/567 - 350/567 = 405 - 350/567 = 55/567
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/7-50/81 5/14-50/81 15/7-50/81 5/21-50/81 25/7-50/81 5/35-50/81 35/7-50/81 5/49-50/81