Subtract 15/8 from 28/54
1st number: 28/54, 2nd number: 1 7/8
28/54 - 15/8 is -293/216.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 8 is 216
Next, find the equivalent fraction of both fractional numbers with denominator 216 - For the 1st fraction, since 54 × 4 = 216,
28/54 = 28 × 4/54 × 4 = 112/216 - Likewise, for the 2nd fraction, since 8 × 27 = 216,
15/8 = 15 × 27/8 × 27 = 405/216 - Subtract the two like fractions:
112/216 - 405/216 = 112 - 405/216 = -293/216
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/54-15/8 28/54-30/8 28/54-15/16 84/54-15/8 28/54-45/8 28/54-15/24 28/54-75/8 28/54-15/40 28/54-15/56