Subtract 7/8 from 30/54
30/54 - 7/8 is -23/72.
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,
30/54 = 30 × 4/54 × 4 = 120/216 - Likewise, for the 2nd fraction, since 8 × 27 = 216,
7/8 = 7 × 27/8 × 27 = 189/216 - Subtract the two like fractions:
120/216 - 189/216 = 120 - 189/216 = -69/216 - After reducing the fraction, the answer is -23/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/54-7/8 30/54-14/8 30/54-7/16 90/54-7/8 30/54-21/8 30/54-7/24 30/54-35/8 30/54-7/40 30/54-49/8 30/54-7/56