Subtract 54/8 from 15/28
1st number: 15/28, 2nd number: 6 6/8
15/28 - 54/8 is -87/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 8 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 28 × 2 = 56,
15/28 = 15 × 2/28 × 2 = 30/56 - Likewise, for the 2nd fraction, since 8 × 7 = 56,
54/8 = 54 × 7/8 × 7 = 378/56 - Subtract the two like fractions:
30/56 - 378/56 = 30 - 378/56 = -348/56 - After reducing the fraction, the answer is -87/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/28-54/8 15/56-54/8 15/28-54/16 45/28-54/8 15/84-54/8 15/28-54/24 75/28-54/8 15/28-54/40 15/28-54/56