Subtract 90/9 from 28/27
1st number: 1 1/27, 2nd number: 10 0/9
28/27 - 90/9 is -242/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 9 is 27
Next, find the equivalent fraction of both fractional numbers with denominator 27 - For the 1st fraction, since 27 × 1 = 27,
28/27 = 28 × 1/27 × 1 = 28/27 - Likewise, for the 2nd fraction, since 9 × 3 = 27,
90/9 = 90 × 3/9 × 3 = 270/27 - Subtract the two like fractions:
28/27 - 270/27 = 28 - 270/27 = -242/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/27-90/9 28/54-90/9 28/27-90/18 84/27-90/9 28/81-90/9 28/27-90/27 28/27-90/45 28/27-90/63