Subtract 7/18 from 90/9
1st number: 10 0/9, 2nd number: 7/18
90/9 - 7/18 is 173/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 18 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 9 × 2 = 18,
90/9 = 90 × 2/9 × 2 = 180/18 - Likewise, for the 2nd fraction, since 18 × 1 = 18,
7/18 = 7 × 1/18 × 1 = 7/18 - Subtract the two like fractions:
180/18 - 7/18 = 180 - 7/18 = 173/18 - In mixed form: 911/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/9-14/18 90/18-7/18 90/9-7/36 90/9-21/18 90/27-7/18 90/9-7/54 90/9-35/18 90/45-7/18 90/9-7/90 90/9-49/18 90/63-7/18