Subtract 8/18 from 3/90
3/90 - 8/18 is -37/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
3/90 = 3 × 1/90 × 1 = 3/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
8/18 = 8 × 5/18 × 5 = 40/90 - Subtract the two like fractions:
3/90 - 40/90 = 3 - 40/90 = -37/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/90-8/18 3/90-16/18 3/90-8/36 9/90-8/18 3/90-24/18 3/90-8/54 15/90-8/18 3/90-40/18 3/90-8/90 21/90-8/18 3/90-56/18