Subtract 90/7 from 49/54
1st number: 49/54, 2nd number: 12 6/7
49/54 - 90/7 is -4517/378.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 7 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
49/54 = 49 × 7/54 × 7 = 343/378 - Likewise, for the 2nd fraction, since 7 × 54 = 378,
90/7 = 90 × 54/7 × 54 = 4860/378 - Subtract the two like fractions:
343/378 - 4860/378 = 343 - 4860/378 = -4517/378
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/54-90/7 49/54-90/14 49/54-90/21 49/54-90/35 49/54-90/49