Subtract 18/7 from 54/8
1st number: 6 6/8, 2nd number: 2 4/7
54/8 - 18/7 is 117/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 7 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 8 × 7 = 56,
54/8 = 54 × 7/8 × 7 = 378/56 - Likewise, for the 2nd fraction, since 7 × 8 = 56,
18/7 = 18 × 8/7 × 8 = 144/56 - Subtract the two like fractions:
378/56 - 144/56 = 378 - 144/56 = 234/56 - After reducing the fraction, the answer is 117/28
- In mixed form: 45/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/8-36/7 54/16-18/7 54/8-18/14 54/8-54/7 54/24-18/7 54/8-18/21 54/8-90/7 54/40-18/7 54/8-18/35 54/56-18/7 54/8-18/49