Subtract 90/8 from 7/54
1st number: 7/54, 2nd number: 11 2/8
7/54 - 90/8 is -1201/108.
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,
7/54 = 7 × 4/54 × 4 = 28/216 - Likewise, for the 2nd fraction, since 8 × 27 = 216,
90/8 = 90 × 27/8 × 27 = 2430/216 - Subtract the two like fractions:
28/216 - 2430/216 = 28 - 2430/216 = -2402/216 - After reducing the fraction, the answer is -1201/108
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/54-90/8 7/54-90/16 21/54-90/8 7/54-90/24 35/54-90/8 7/54-90/40 49/54-90/8 7/54-90/56