Subtract 9/90 from 4/9
4/9 - 9/90 is 31/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 9 × 10 = 90,
4/9 = 4 × 10/9 × 10 = 40/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
9/90 = 9 × 1/90 × 1 = 9/90 - Subtract the two like fractions:
40/90 - 9/90 = 40 - 9/90 = 31/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/9-9/90 4/9-18/90 4/18-9/90 12/9-9/90 4/9-27/90 4/27-9/90 20/9-9/90 4/9-45/90 4/45-9/90 28/9-9/90 4/9-63/90 4/63-9/90