Subtract 18/9 from 8/90
1st number: 8/90, 2nd number: 2 0/9
8/90 - 18/9 is -86/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 9 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
8/90 = 8 × 1/90 × 1 = 8/90 - Likewise, for the 2nd fraction, since 9 × 10 = 90,
18/9 = 18 × 10/9 × 10 = 180/90 - Subtract the two like fractions:
8/90 - 180/90 = 8 - 180/90 = -172/90 - After reducing the fraction, the answer is -86/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/90-18/9 8/90-36/9 24/90-18/9 8/90-54/9 8/90-18/27 40/90-18/9 8/90-90/9 8/90-18/45 56/90-18/9 8/90-18/63