Subtract 54/8 from 5/7
1st number: 5/7, 2nd number: 6 6/8
5/7 - 54/8 is -169/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 8 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 7 × 8 = 56,
5/7 = 5 × 8/7 × 8 = 40/56 - Likewise, for the 2nd fraction, since 8 × 7 = 56,
54/8 = 54 × 7/8 × 7 = 378/56 - Subtract the two like fractions:
40/56 - 378/56 = 40 - 378/56 = -338/56 - After reducing the fraction, the answer is -169/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/7-54/8 5/14-54/8 5/7-54/16 15/7-54/8 5/21-54/8 5/7-54/24 25/7-54/8 5/35-54/8 5/7-54/40 35/7-54/8 5/49-54/8 5/7-54/56